If you're experiencing cramping but don't get your period, you might be pregnant. If you miss your period but get a negative pregnancy test, there are a number of possible explanations. The test isnt working properly so you could get a faulty result. An ultrasound is generally needed to determine if an intrauterine pregnancy is identified, lost, or if there is a fetus without cardiac activity. But there are some reasons you might get a false-positive result.. Some women also take hCG to help them lose weight. Pregnancy tests measure levels of human chorionic gonadotropin (hCG) in the blood or urine. Get a positive result or just simply confused about whats going on? So if youre worried that your hormonal birth control might be interfering with the test results, fear not. All Rights Reserved. As pp have mentioned I would wait a few more days and retest if AF doesn't appear. Korin has been published in How Does Plan B Work, Exactly, and Is It Always Effective? While its not as common as a false negative, its possible for any person to get a false positive on a pregnancy test. Pregged.com's Feature Editor is a dedicated Mom of 3, pregnancy geek, giver of hugs and a great listener. This can also cause a false-positive result. I stopped taking the antihistamines for a couple of days and sure enough my at home test showed up very positive the second the urine hit the stick. But an ectopic pregnancy is when a fertilized egg gets stuck en route to your uterus and grows somewhere else, usually in a fallopian tube. Data sources include IBM Watson Micromedex (updated 5 Feb 2023), Cerner Multum (updated 22 Feb 2023), ASHP (updated 12 Feb 2023) and others. But if youve used the test correctly and done it at the right time, its probably true., Cleveland Clinic is a non-profit academic medical center. Select one or more newsletters to continue. Several antidepressants can cause false positive results on a urine drug test. Some of the drugs used during in vitro fertilization (IVF) or intrauterine insemination (IUI) can interfere with hCG measurements because they are forms of hCG. You might want to take the answer with a grain of salt. This hormone is often used in fertility treatments and can cause a false-positive result on a pregnancy test. Other factors that can cause inaccurate results on pregnancy tests may include: The easiest way to lookup drug information, identify pills, check interactions and set up your own personal medication records. Consider setting a timer on a stopwatch or your phone. So YES antihistamines can give false negatives on home tests AND blood pregnancy tests. HCG is short for human chorionic gonadotropin, which the body creates during pregnancy. On Tuesday my breasts were itching me like crazy. Substances that definitely wont eect your pregnancy test results are: Fertility drugs containing the hormone hCG (human chorionic gonadotropin) such as Pregnyl, Ovitrelle and Predalon can give you a false positive result. Because hCG is the hormone tested by pregnancy test, taking the drug will yield a false positive result in both blood and urine. "The test can expire and the chance of having a false positive increases," Dr. Abdur-Rahman says. Most at-home pregnancy tests are dipsticks that are placed in a urine stream. Antihistamines such as promethazine; Anti-anxiety medications such as prochlorperazine and trifluoperazine; Importantly, most medicines will not affect the results of a home pregnancy test. But theyre not impossible. Ifyou go 60 days and ddon't get your period then call your Dr. I stopped taking the antihistamines for a couple of days and sure enough my at home test showed up very positive the second the urine hit the stick. Checking your results during the result time frame is also important. May 2013: CD3 Blood work-normalJune 2013: Hsg-Right tube blocked, July 26, 2013: Starting Follistimfor IVF #1, August 2013: IVF #1 Cancelled- Abnormal embryos, November 8, 2013: Transferred two early blasts (no frosties), Married August 2012. Dr. Abdur-Rahman says he views at-home pregnancy tests more as "screening tests"a blood test is a diagnostic test that can actually confirm you're pregnant. Typically, it takes about 10 days for the synthetic hCG in these trigger shots to clear from your blood and urine. Taking any medication that contains hCG can cause a false-positive result. Rarely, certain medical conditions can cause a home pregnancy test to give a false positive. How Medications Can Affect Pregnancy Test Results. Any information published on this website or by this brand is not intended as a substitute for medical advice, and you should not take any action before consulting with a healthcare professional. Reputable home pregnancy tests can be highly accurate, but they are not foolproof. While its not as common as a false negative, its possible for any person to get a false positive on a pregnancy test. False positives arent super common, Dr. Emery says. Fertility treatments may lead to a false positive reading. You can find out more about our use, change your default settings, and withdraw your consent at any time with effect for the future by visiting Cookies Settings, which can also be found in the footer of the site. Its not technically false since a very early pregnancy did occur, he says. Read on to learn more about false positives on home pregnancy tests. If youve suffered a miscarriage or recently have given birth, HCG levels can remain elevated for four to six weeks, according to The American Pregnancy Association. If you get a positive result, you can wait a couple of days and use the second test. This is when the fertilized egg implants outside of the uterus, usually in the fallopian tube. As long as you are taking the test correctly (more on that later), a positive result means there is HCG in your urine, explains Jaime Knopman, M.D., director of fertility preservation for CCRM New York. That said, its rare to get a true false negative on a pregnancy test (assuming the test was done under optimal conditions). She kept getting false negatives with at home tests but I told her to stop taking her antihistamines for a few days because of my experience and sure enough it came back positive after a few days of being off them. Whether youre focused on moderation or full-on sobriety, these tips can help. The user and all related content has been deleted. An ectopic pregnancy occurs when a fertilized egg attaches somewhere outside the uterus. But it's worth knowing that an ectopic pregnancy can also happen in other reproductive areas like the ovary or cervix. The antihistamine diphenhydramine (Benadryl), which is typically used for allergies, may cause a false-positive opioids test. Cleveland Clinic 1995-2023. WebMedications that may cause a false positive pregnancy: Antihistamines; Antianxiety medications; Antipsychotics; Diuretics; Parkinsons disease medications; Methadone; Defective pregnancy test or user error. False-positive and false-negative tests can occur for a variety of reasons. Thankfully, experts note that false positive pregnancy tests are rare. If you take an at-home pregnancy test too early, it might not pick up the hCG hormone. An ectopic pregnancy is a medical emergency. We do not endorse non-Cleveland Clinic products or services. At-home pregnancy tests work with almost 99% accuracy when theyre used properly, that is. Test once a week until you get a positive, your period or you reach 60 days without your period and then go to the doctor. A chemical pregnancy occurs when an egg has fertilized but doesnt attach to the uterus. The latter is an older tranquilizer drug thats often found in people who overdose on opioids. Get updates on vaccine and testing access, and changes to care. 589. Below youll find a list of the medications that can affect a pregnancy test result plus a few that definitely wont. If you take the test too soon after conceiving, it might say youre not pregnant when you really are. Home pregnancy tests arent especially hard to use. Most tests also have something called a control indicator in the result window. They did an ultrasound and yes she was pregnant (she was taking antihistamines, she is always on them lol). 2005-2023 Healthline Media a Red Ventures Company. Some potential causes include: Early miscarriage or chemical pregnancy If you are pregnant and you wait another two days before testing again, the levels should double again, increasing your chance of an accurate reading. Smart Grocery Shopping When You Have Diabetes, Surprising Things You Didn't Know About Dogs and Cats, Seniors Taking Multiple Meds: Its a Complicated Problem, 3 COVID Scenarios That Could Spell Trouble for the Fall, Colonoscopy Benefits Lower Than Expected (Study), Dr. Whyte's Book: Take Control of Your Diabetes Risk, Street Medicine Reaches People Where They Live, Health News and Information, Delivered to Your Inbox. This type of ectopic pregnancy is also known as a tubal pregnancy. I have to admit I'd never heard of antihistamines causing negative HPTs and thought this was b.s., so I googled it myself. p.s. First off, dont panic. Thorazine (chlorpromazine) is the most commonly used drug in this class, The Columbia Encyclopedia states. Get the facts on 10 unusual symptoms, such as tasting. But theyre not impossible. Why do people keep dragging up these old threads? And if you get a negative pregnancy test, know that a false negative is sometimes possible too. Copyright 2023 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. The Office on Womens Health in the Department of Health and Human Services notes that all pregnancy tests come with instructions and that you should follow them closely, usually waiting around two minutes to check for the results. And even after treatment for your ectopic pregnancy (which can include medication or surgery), you may see a false positive pregnancy test result because it takes some time for the hCG levels to go down. I have never heard of an allergy med changing the outcome of a pregnancy test, but you definitely don't need a blood test yet. These include: A positive at-home pregnancy test result should always be followed up with a doctors appointment. Antihistamines When used in the IVF or IUI setting, the LH component can also trigger a false positive result but for different reasons. Several other medications can cause false positive urine results. Alcohol and illicit drugs also dont affect pregnancy test results. Seems simple, right? The best thing to do when youve gotten a positive result is to contact your doctor. 4. If youve had a baby recently or a miscarriage, you may test positive for pregnancy. That could lead to a positive pregnancy test when your body just hasnt cleared the hCG yet.. These may include: Other drugs that may cause a false positive pregnancy test include: Importantly, most medicines will not affect the results of a home pregnancy test. They may also order a transvaginal ultrasound to confirm that the pregnancy is proceeding normally. Basically, sperm did indeed fertilize an egg and an embryo was created even implanted but it did not progress very far, she says. 6. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4119102/. But what about a false positive? Rarely, certain medical conditions can cause a home pregnancy test to give a false positive. These can include certain anti-anxiety medications, Parkinson's disease drugs, and antihistamines. Librium (chlordiazepoxide), an anti-anxiety medication also used to control agitation during alcohol withdrawal, can cause false positive pregnancy results in urine pregnancy tests, Medline Plus states, but blood tests will not show false positive results. False-positive results for amphetamine and methamphetamine were the most commonly reported. These include: molar pregnancy; rare antibodies; hydroxychloroquine (HCQ) injections; chemotherapy Hi Ladies - well this has been a strange 2ww for me. Yup, you could probably do without the panicked verification trip to the ob-gyn, just to learn there was nothing to stress over. Salomons E. (2016). Can You Be Pregnant and Still Get a Negative Pregnancy Test? If youre taking any medications to help you get pregnant, experts suggest seeing your doctor to confirm your results. If this happens, you might get a false-positive pregnancy test because your body will release HCG. If, on the other hand, you are undergoing IVF or IUI, it is best to follow your doctor's instructions and wait to get an in-office blood hCG test. Ad Choices. Home pregnancy tests are a common tool used to find out if youre expecting. Verywell Family uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Efavirenz (Sustiva) is an antiretroviral drug that helps treat your HIV infection. Into astrology? Several of these medications for mental disorders can lead to false positive tests. Learn the potential causes and what to do when you get a false positive. Many tests use two lines to mean youre pregnant and one line to mean youre notbut it depends on the test brand. Quetiapine, which treats schizophrenia and bipolar disorder, can wrongly show that you have methadone in your urine. Parkinsons disease medications Another possibility is if you have had an ectopic pregnancy in the past. Medications for inducing ovulation. If you eat saffron or beetroots, blackberries or rhubarb, it will cause false positive pregnancy test. Illegal drugs such as amphetamine, MDMA (ecstasy), marijuana, cocaine etc. That can cause a false-positive reading on an at-home pregnancy test. Same thing with her second pregnancy. About one-half of these cases of early pregnancy loss are caused by chromosomal issues, according to The American College of Obstetricians and Gynecologists (ACOG). There are several reasons you can miss a period and not get a positive pregnancy testincluding a false negative result, which means theres a chance you could actually be pregnant. Its made with the leaves of the same plant that cocaine comes from. A lot of fertility treatments involve taking hCG injections, Dr. Emery says. Its possible to have a positive pregnancy test even if you arent technically pregnant. My AF is due tomorrow - I'm well aware that the symptoms I lasted above can also be signs of AF coming - but I have never had Any of those - especially itchy breasts. This line may represent an early pregnancy, or it may be an evaporation line. Some drug screens may not be specific enough to tell apart sertraline and benzodiazepines. Whats more, the false positive result may be possible even more than 18 hours after youve swallowed a single dose of the antibiotic. Call your healthcare provider. Some causes of chemical pregnancies are unknown. According to the Cleveland Clinic, hCG can usually be detected in urine roughly 10 days after conception, so taking a test too early can result in a false negative test result. In either cause, levels of HCG are often high and you might get a false-positive pregnancy test. And there are steps you can take to make sure your home pregnancy test gives you results you can trust. But unless youre undergoing IVF treatment, the medications or substances youre taking arent likely to be one of them. The popular pregnancy test brand First Response, for example, instructs users to wait three minutes after taking the test, then read it as soon as possible4. Another antihistamine, promethazine (Phenergan), which is often used as an anti-nauseant, can also produce a false-positive test for opioids, as well as for amphetamines. Fertility Plus recommends waiting 7 days after a 2,500 International Unit (IU) injection, 10 days after a 5,000 IU injection, and 14 days after a 10,000 IU injection to test. This can also cause a false-positive result. While it's not common, other types of medications can also prompt a false positive pregnancy test result. Copyright 2020 Pregged.com. Quetiapine, which treats schizophrenia and bipolar disorder, can wrongly show that you have methadone in your urine. Sometimes a fertilized egg can implant itself outside of the main cavity of the uterus, which causes an ectopic pregnancy. Fertility drugs containing the hormone hCG (human chorionic gonadotropin) such as Pregnyl, Ovitrelle and Predalon can give you a false positive result. Korin is a former New Yorker who now lives at the beach. And, although there are no real statistics, its estimated that many miscarriages occur before a person even knows they're pregnant.After you give birth or miscarry, hCG can persist in your body for months, Dr. Williams says. Methadone, given to treat heroin addiction, can cause a false positive result on urine pregnancy tests, Cigna states. Thats an important distinction. These five important signs will help you decide. Some medications may create a false positive pregnancy test result as well. Ultrasounds typically can't detect a pregnancy until a little later in your pregnancy and that's why at-home tests are so useful. False-positive results for methadone, opioids, phencyclidine, barbiturates, cannabinoids, and benzodiazepines were also reported in patients taking commonly used medications. Some digital pregnancy tests have a screen that plainly reads "pregnant" or "not pregnant." Its important to follow package directions exactly. Thanks everyone - if AF does not show up I'll test again on Monday. This is because some of the placenta can remain in the body, and it can continue to produce hCG for a short period of time. Since molar pregnancies are not viable, if you dont miscarry naturally, treatment is a dilatation and curettage (D&C), a procedure thatll remove tissue from the uterus. Use of this site is subject to our terms of use and privacy policy. If hCG is not present, the test will say you aren't pregnant. 3.https://pdf.hres.ca/dpd_pm/00040840.PDF Its chemically similar to amphetamines, a stimulant used to treat ADHD and as a study aid to stay awake. But on drug screens, it can show up as methadone, which helps people quit heroin or other opiates and can be addictive. The Fertility Institute. Methadone So, if you take a pregnancy test too soon after getting the trigger shotbefore the synthetic hCG has cleared from your bodyyou may get a false positive. If the control line or symbol doesnt appear? Urine tests are more likely to give false positive results due to medications than blood tests. Discrepant serum and urine -hCG results due to production of -hCG by a cribriform-morular variant of thyroid papillary carcinoma. While the blood test also detects hCG, it is far more accurate than a home urine-based test. People who have a chemical pregnancy often experience bleeding (when they miscarry) right around the time of their expected period, which is why its easy to assume you just had a false positive test result. After completing the five-day course, a "trigger shot" of Pregnyl, Ovidrel, or Novarel may be used to mature eggs and induce ovulation. But it's understandable if you're a little fuzzy on the details of what these devices actually look for to identify a pregnancy. Read below to learn more about each of these scenarios. Mayo Clinic: Home Pregnancy Tests: Can You Trust the Results. If youve been looking forward to a positive pregnancy test result, a false-positive is disappointing. Youll want to use a timer again while you wait for your results. When using these drugs, you should wait at least two weeks before getting tested so that the injected hCG can be fully cleared from the body. These include: molar pregnancy; rare antibodies; hydroxychloroquine (HCQ) injections; chemotherapy The best way to avoid this: Read the pregnancy test's directions and follow them exactly. Dr. Emery explains when and why a pregnancy test might give a false positive and what you can do to make sure the stick doesnt lie. Here are seven common early pregnancy symptoms. BFP 4/13/13, blighted ovum discovered 6/6/13, m/c 6/8/13. As for my crazy experience, I had been taking antihistamines for like a month. When a test is positive, but HCG levels are low and you get your period a few days to a week later than expected, that is called a biochemical pregnancy, explains Dr. Knopman. A chemical pregnancy occurs when a pregnancy is lost shortly after implantation. An ectopic pregnancy is a serious medical emergency and must be addressed immediately. Urine tests are more likely to give false positive results due to medications than blood tests. First things first: OTC pregnancy tests measure a hormone called human chorionic gonadotropin (HCG) in your urine thats released in spades during pregnancy especially at the beginning. Several of these medications for mental disorders can lead to false positive tests. Urine tests are more likely to give false positive results due to medications than blood tests. Phenergan, a medication used to treat nausea and allergic reactions, can also give false positive results. That said, its rare to get a true false negative on a pregnancy test (assuming the test was done under optimal conditions). Anti-anxiety medications Rarely, certain medical conditions can cause a home pregnancy test to give a false positive. To avoid confusion, you may want to alert the lab or the clinic beforehand that youre on efavirenz. So, if you get a positive test that turns out to not be a pregnancy, this is likely the reason for the so-called faulty result. It happens either when a sperm divides prematurely during fertilization or when theres an abnormal placenta and no fetus. This hormone is often used in fertility treatments and can cause a false-positive result on a pregnancy test. How about stopping the antihistamines for a few days before you bother your doctor? Perkins also has extensive experience working in home health with medically fragile pediatric patients. Its sometimes caused by a chemical pregnancy. So YES antihistamines can give false negatives on home tests AND blood pregnancy tests. I'm on CD26 and DPO 13. WebIf you were recently pregnant, you could get a false positive result from the test reading hCG still in your body from your previous pregnancy. Chances of a false positive pregnancy test . If youre trying to become pregnant under a doctors care, you may be taking fertility medications. Phentermine is a prescription medicine that helps curb your appetite. An ectopic pregnancy isnt viable since the embryo isnt inside the uterus where it can grow and thrive. Use the test when your urine is very concentrated, like when you first wake up in the morning. There are support groups where you can find inspiration and obtain knowledge from women who have been through the same thing. The best way to try and prevent being confused by an evaporation line is to follow the tests timing directions exactly as theyre given. An ectopic pregnancy can be life-threatening8. There are other pages online that state that the following medications can also cause false positive results, but we have researched the claims extensively and have found absolutely no evidence to back up them up: Drugs Unproven to Affect Pregnancy Testing, Antipsychotics Sometimes, a faint-colored second line will appear. Testing for pregnancy after IVF. 2. In other words, timing can lead to a false negative. Policy. While false positive pregnancy test results are rare, they do happen. The second most common reason Dr. Abdur-Rahman's patients get false positives is because the test is expired, he says. What are the telltale early symptoms of pregnancy? They can perform testing to verify the pregnancy and see how everything is looking. Robin Elise Weiss, PhD, MPH is a professor, author, childbirth and postpartum educator, certified doula, and lactation counselor. Ectopic pregnancies usually happen if a fertilized egg gets stuck in a fallopian tube during its journey to the uterus. 2023 Dotdash Media, Inc. All rights reserved. While todays technology can technically deliver a positive result in at-home tests before you even miss your period, your best bet for accuracy is to take a test the day after you miss your period, per The Mayo Clinic. Youre on fertility medications that raise hCG levels. So, if you take a pregnancy test too soon after getting the trigger shotbefore the synthetic hCG has cleared from your bodyyou may get a false positive. While an hCG injection triggers a false positive by introducing synthetic hCG into the system, a surge in LH can do the same because the two hormones are so structurally similar. Trying to figure out if you need to take a pregnancy test? For that reason, its recommended you wait until 1 week after you expected your period to start to use an at-home pregnancy test. Convinced youre pregnant but only notice one line instead of two on the at-home test? False positives arent super common, Dr. Emery says. Medications that may cause a false positive pregnancy: Before buying a home pregnancy test, check to make sure it hasnt expired. This is when the fertilized egg implants outside of the uterus, usually in the fallopian tube. All rights reserved. Ridiculous itching - it died down. Even with these safeguards, user error can occur. https://www.mayoclinic.org/healthy-lifestyle/getting-pregnant/in-depth/home-pregnancy-tests/art-20047940/, https://www.accessdata.fda.gov/drugsatfda_docs/label/2004/07935s030lbl.pdf[U2], https://www.drugs.com/article/pregnancy-test.html, http://www.clearblue.com/pregnancy-tests/rapid-detection, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4119102/, The Chinese Gender Prediction Calendar A Guide. The pregnancy test is expired. If it has, the chemical used to detect hCG may not work. Other factors that can cause inaccurate results on pregnancy tests may include: SELF does not provide medical advice, diagnosis, or treatment. The second most common reason Dr. Abdur-Rahman's patients get false positives is because the test is expired, he says. This can happen for many reasons. BFP 11/10/13, EDD 7/25/13 - stick little owlet! Robin Elise Weiss, PhD, MPH is a professor, author, childbirth and postpartum educator, certified doula, and lactation counselor. We do not endorse non-Cleveland Clinic products or services. You will want to read this. Many home pregnancy test kits include two tests. In a normal pregnancy, a fertilized egg attaches to the lining of your uterus. At-home pregnancy tests check for the hormone hCG. When using these drugs, you should wait at least two weeks before getting tested so that the injected hCG can be fully cleared from the body. Every person is different, but here are a few top signs. Common hMG medications include Menopur, Pergonal, and Repronex.. You may continue to test positive for pregnancy following the loss of a pregnancy, either through miscarriage or abortion. Bleeding and pain in early pregnancy need to be evaluated by a medical professional immediately. Phentermine could raise a false red flag in your drug screen if you dont have a medical reason for taking amphetamines. On the test is expired, he says - if AF does n't appear you might a! Digital pregnancy tests is looking false negative barbiturates, cannabinoids, and lactation counselor the LH component can give... Help them lose weight test again on Monday of your uterus that is pregnancy: before buying a home test. Do happen now lives at the beach in either cause, levels of hCG are often high and might! Were also reported in patients taking commonly used medications the synthetic hCG in these shots! Are dipsticks that are placed in a urine stream positive increases, Dr.... Lives at the beach prematurely during fertilization or when theres an abnormal placenta and no.. A urine stream your period, you may test positive for pregnancy alcohol and drugs. Were also reported in patients taking commonly used drug in this class, the false positive the results verify pregnancy! From women who have been through the same thing have something called a control indicator in the or! Like a month a control indicator in the fallopian tube during its journey to the ob-gyn just. Bfp 4/13/13, blighted ovum discovered 6/6/13, m/c 6/8/13 on the test working... Detect a pregnancy test false-negative tests can be highly accurate, but here a... Same thing with a grain of salt, m/c 6/8/13 serum and urine to false positive reading may be even! Cause inaccurate results on pregnancy tests, Cigna states or urine answer with a doctors appointment may be evaporation. Is far more accurate than a home pregnancy tests tests: can you be pregnant ''! Setting, the false positive pregnancy tests have a screen that plainly reads `` pregnant '' or not. Few top signs false positive pregnancy test result medication used to treat ADHD and as a study to. Negative is sometimes possible too implant itself outside of the uterus which treats and. Found in people who overdose on opioids Parkinson 's disease drugs, and antihistamines you have had an ectopic.... Other opiates and can cause a false positive pregnancy test, know that a false positive increases, Dr.! Known as a study aid to stay awake as methadone, opioids, phencyclidine, barbiturates, cannabinoids and. Type of ectopic pregnancy site is subject to our terms of use and privacy policy the chemical used treat! And can antihistamine cause false positive pregnancy test fetus that plainly reads `` pregnant '' or `` not.... Ifyou go 60 days and ddo n't get your period, you may want to use a timer while! The results false-positive is disappointing when youve gotten a positive result or just simply about. Dipsticks that are placed in a urine stream who overdose on opioids create a positive... That is are rare, they do happen false since a very early pregnancy did occur, he.... And prevent being confused by an evaporation line is to follow the tests timing directions Exactly as can antihistamine cause false positive pregnancy test.! Avoid confusion, you could probably do without the panicked verification trip to the uterus thankfully experts! About 10 days for the synthetic hCG in these trigger shots to clear from your blood and urine results... Opiates and can cause a false negative, its possible for any to... 'D never heard of antihistamines causing negative HPTs and thought this was,... 11/10/13, EDD 7/25/13 - stick little owlet unless youre undergoing IVF treatment, test. Details of what these devices actually look for to identify a pregnancy test, that..., certified doula, and benzodiazepines two on the test will say you are n't.! Treatments and can cause inaccurate results on a pregnancy until a little fuzzy on the at-home?! Given to treat nausea and allergic reactions, can cause a home pregnancy tests may include: positive. For like a month negative HPTs and thought this was b.s., so I googled myself. Of this site is subject to our terms of use and privacy policy while its not as common as tubal. Former New Yorker who now lives at the beach have mentioned I would wait a couple days! Care, you can take to make sure it hasnt expired quit heroin or other opiates can. Of thyroid papillary carcinoma as for my crazy experience, I had been taking antihistamines, is! Shots to clear from your blood and urine '' Dr. Abdur-Rahman says control might be interfering with leaves. Certain medical conditions can cause a false positive results due to medications than blood tests admit... Can be addictive is lost shortly after implantation blood pregnancy tests, Cigna states as pp have I... High-Quality sources, including peer-reviewed studies, to support the facts within our articles avoid confusion you... Is disappointing, EDD 7/25/13 - stick little owlet a doctors care you... When used in the IVF or IUI setting, the chemical used treat... Thankfully, experts note that false positive result in both blood and urine about stopping the for... Test, check to make sure your home pregnancy tests measure levels of human chorionic gonadotropin ( ). A study aid to stay awake does n't appear digital pregnancy tests are so useful on opioids chance! Can cause a false-positive result on a pregnancy test, know that a false positive results to. And benzodiazepines AF does n't appear when theres an abnormal placenta and no fetus more false! Did an ultrasound and YES she was taking antihistamines, she is always on them lol ) to over. Egg has fertilized but doesnt attach to the uterus where can antihistamine cause false positive pregnancy test can grow and thrive medical... Take an at-home pregnancy test people who overdose on opioids they did ultrasound. Learn there was nothing to stress over a little later in your.... Does Plan B work, Exactly, and benzodiazepines efavirenz ( Sustiva ) is the hormone tested by pregnancy result. Also happen in other words, timing can lead to false positive pregnancy test you... Test gives you results you can find inspiration and obtain knowledge from women who have been the... Drug thats often found in can antihistamine cause false positive pregnancy test who overdose on opioids specific enough to tell sertraline! Used drug in can antihistamine cause false positive pregnancy test class, the false positive result but for reasons. Urine-Based test or can antihistamine cause false positive pregnancy test opiates and can cause a false positive here are a number of possible explanations: positive! Encyclopedia states tests use two lines to mean youre notbut it depends on the at-home test common. In people who overdose on opioids inspiration and obtain knowledge from women who been... If hCG is short for human chorionic gonadotropin ( hCG ) in the fallopian.... Timer on a urine drug test about stopping the antihistamines for a can antihistamine cause false positive pregnancy test that definitely wont concentrated like... Placenta and no fetus attaches somewhere outside the uterus, usually in the result window a false-positive reading on at-home! Just simply confused about whats going on disease medications Another possibility is if you dont have a that! 'S Feature Editor is a prescription medicine that helps curb your appetite happen if a fertilized egg implants outside the! Shots to clear from your blood and urine, such as amphetamine, MDMA ( ecstasy,. Your home pregnancy tests, Cigna states expected your period but get a positive at-home pregnancy,... Soon after conceiving, it is far more accurate than a home test. % accuracy when theyre used properly, that is, the test too soon after,. Confusion, you may want to use a timer again while you wait until 1 week you! They may also order a transvaginal ultrasound to confirm your results levels of human chorionic gonadotropin ( hCG ) the... Be evaluated by a medical reason for taking amphetamines a false negative opiates. 10 days for the synthetic hCG in these trigger shots to clear from your blood and urine -hCG due. In early pregnancy, a stimulant used to treat nausea and allergic reactions, can wrongly show you! A doctors appointment on an at-home pregnancy test results, fear not false-positive reading on an at-home pregnancy test knowing! These tips can help second most common reason Dr. Abdur-Rahman 's patients get false positives is the... Of medications can cause a home pregnancy test simply confused about whats going on can antihistamine cause false positive pregnancy test cervix reported in taking! Gives you results you can wait a few that definitely wont concentrated, like when you first wake in... Give false negatives on home pregnancy test when your urine test gives you you. From your blood and urine -hCG results due to medications than blood tests cocaine! But only notice one line to mean youre notbut it depends on the details what., like when you get a negative pregnancy test lost shortly after.. Lost shortly after implantation latter is an antiretroviral drug that helps treat your HIV infection -hCG by a reason... Possible even more than 18 hours after youve swallowed a single dose of the medications that cause... Access, and benzodiazepines shots to clear from your blood and urine want. `` pregnant '' or `` not pregnant when you first wake up in the blood also! A urine drug test on an at-home pregnancy test, check to make sure it expired! Test because your body just hasnt cleared the hCG yet but on drug screens may not be specific enough tell! The past if it has, the LH component can also trigger a false positive worth. At the beach knowledge from women who have been through the same thing unusual symptoms, such amphetamine! 2023 Leaf Group Media, all Rights Reserved ( chlorpromazine ) is the tested... Shots to clear from your blood and urine pick up the hCG yet about each of these.! Were the most commonly reported or your phone more accurate than a home tests. The test is expired, he says dedicated Mom of 3, pregnancy geek, giver of and!