what medications can cause a false positive pregnancy test

Pregnancy Test Guide - Drugs.com Sertraline can cause a positive result for the hallucinogen LSD on a urine drug test. Almost all pregnancy tests are done by determining the amount of Human Chorionic Gonadotrophic (hCG) hormone in blood or urine. Can You Be Pregnant and Still Get a Negative Pregnancy Test. The embryo will still produce hCG, even though it has implanted in the wrong place. (2017). Some women also take hCG to help them lose weight. WebWhat are other conditions that can cause a positive test for hCG aside from pregnancy? Sometimes theyre caused by hormonal levels that dont represent pregnancy. Some anti-anxiety medications. We comply with the HONcode standard for trustworthy health information. It is possible to get a positive result when youre not actually pregnant, which is called a false-positive. There are also certain medications taken for infertility that cause elevated hCG without a pregnancy. Whats more, the false positive result may be possible even more than 18 hours after youve swallowed a single dose of the antibiotic. (2012). Stout, P.R., et al. Melanson, S.E.F., et al. Key takeaways: Home pregnancy tests are 99% accurate when used correctly. Oxaprozin cross-reactivity in three commercial immunoassays for benzodiazepines in urine. Diphenhydramine is an antihistamine that can help treat allergies, itching, and cold symptoms. This is a rare one, but some medical conditions such as certain kinds of cancer, chronic kidney disease, as well as problems with your ovaries could cause the body to have increased levels of HCG and potentially lead to a false-positive pregnancy test. Your privacy is important to us. These results are due to the high amount of white blood cells, red blood cells, and nitrates in your urine. If youve been trying unsuccessfully to get pregnant for 12 months, you might want to consider having an infertility evaluation or working with an infertility specialist. Can A False Positive Pregnancy Test Heres how to tell. They may be able to run a second test to confirm whether these results are accurate or not. It can be extremely upsetting to receive a false positive pregnancy test result, especially if youve had trouble getting pregnant or are actively trying to get pregnant (or both). That may lead to false-positive results. How often do false-positive phencyclidine (PCP) urine screens occur with use of common medications?. Checking your results during the result time frame is also important. Alcohol and illicit drugs also dont affect pregnancy test results. Baron, J.M., et al. Usually, you will have a heavy period soon after your period is normally due. A non-pregnant woman with elevated beta-HCG: A case of para-neoplastic syndrome in ovarian cancer. Medications: Some medications can also cause a false-positive pregnancy. False-positive amphetamine toxicology screen results in three pregnant women using labetalol. Now, youll enjoy a streamlined experience created specifically for healthcare providers. Many home pregnancy test kits include two tests. (2014). This line may represent an early pregnancy, or it may be an evaporation line. Drugs that contain the hCG hormone aimed at boosting fertility may impact pregnancy test results. One of the most common mistakes is taking the test too early during your cycle. It is therefore important to read your results within the time frame mentioned on the kit. Promethazine is part of a group of medications called phenothiazines. Read on to learn more about false positives on home pregnancy tests. Follow up with a blood test will give more accurate results. This is important because differenttest measures the levels of HCG in a different way. We avoid using tertiary references. Verywell Family uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. The primary reason for a false negative test is performing the test at a very early stage of pregnancy. Women unable to ovulate on their own are often prescribed a fertility medication such as Clomid (clomiphene citrate). after miscarriage, recent birth or termination) some rare ovarian cysts. Quetiapine, which treats schizophrenia and bipolar disorder, can wrongly show Interpreting Faint Lines on a Pregnancy Test. 2005 - 2023 WebMD LLC, an Internet Brands company. Some causes of chemical pregnancies are unknown. Neurological Drugs Anti-psychotics, anti-convulsant, and anti-anxiety medications Anti-Parkinsons drugs may also affect the results of pregnancy tests. Patients in medical treatment for attention deficit/hyperactivity disorder (ADHD): Are they at risk in drug screening?. It may also cause a positive result for benzodiazepines. What can cause a false positive? 2023 Healthline Media LLC. What Can Cause a False Positive Drug Test - WebMD This may be due to various factors. During early pregnancy, the amount of HCG in blood and urine rises quickly doubling every Acta Clinica Belgica. Summary. These medications can sometimes cause a false-positive on your pregnancy test. Our experts continually monitor the health and wellness space, and we update our articles when new information becomes available. Casey, E.R., et al. But its not clear what dose of diphenhydramine would cause a false positive result. Pregnancy Test Guide 11 /11. Depending on your situation, it might be a relief to find out youre not pregnant. While the blood test also detects hCG, it is far more accurate than a home urine-based test. Learn about the rare reasons for a false-positive pregnancy test. A small quantity of this hormone is also secreted by the colon, liver, and pituitary gland. Pregnancy Symptoms: 10 Early Signs That You May Be Pregnant, sciencedirect.com/science/article/abs/pii/S0009898114003787, ucsfhealth.org/education/conception_how_it_works/, sciencedirect.com/science/article/pii/S2352578916300297?via%3Dihub, annlabmed.org/journal/view.html?doi=10.3343/alm.2012.32.2.167, acubalance.ca/blog/what-chemical-pregnancy-did-i-just-have-early-miscarriage-or-false-positive, columbiadoctors.org/treatments-conditions/uterine-anomaly, Weird Early Pregnancy Symptoms No One Tells You About, Cramps but No Period: 7 Early Pregnancy Symptoms, Debra Rose Wilson, Ph.D., MSN, R.N., IBCLC, AHN-BC, CHT, Causes of a Negative Pregnancy Test with No Period. Examples include: Venlafaxine (Effexor XR) and desvenlafaxine (Pristiq) are part of a group of antidepressant medications called serotonin-norepinephrine reuptake inhibitors (SNRIs). This hormone rises when an egg is fertilized. How Soon Can You Take a Pregnancy Test After IVF? But on a drug screen, it can make you seem to have used marijuana. False Positive Pregnancy Tests, Explained - Clearblue Lets start by saying this: Most medications wont affect the results of a pregnancy test but certain medications, including some injections used to stimulate By providing your email address, you agree to receive emails containing coupons, refill reminders and promotional messages from GoodRx. Pregnancy test kits detect human chorionic gonadotropin (hCG), a hormone that starts to rise when a sperm fertilizes an egg. Rengarajan, A., et al. Why False Positive Pregnancy Tests Can Happen? | HealthNews Back to School: Simple Ways to Get Ready for the Week. Its possible to have a positive pregnancy test even if you arent technically pregnant. GoodRx is not offering advice, recommending or endorsing any specific prescription drug, pharmacy or other information on the site. Efavirenz (Sustiva) is an antiretroviral drug that helps treat your HIV infection. Some rare medical conditions, such as a trophoblastic tumor that forms due to problems with the fertilization of an egg, can cause misleading results. Other drugs that may cause a false result include aspirin and methadone. Thank you, {{form.email}}, for signing up. How Many Days After Missed Period Pregnancy Test Is Positive. They may be able to perform a second test thats more specific and accurate. Subscribe to Drugs.com newsletters for the latest medication news, new drug approvals, alerts and updates. What can cause a false positive pregnancy test? The content on Healthgrades does not provide medical advice. Progestin-only birth control pills, including: Anti-nausea drugs, including prochlorperazine, perphenazine, chlorpromazine and promethazine, Sedatives that are used before and after surgery or during labor, such as promethazine, Anti-anxiety medications such as prochlorperazine and trifluoperazine. There are various causes of false-positive pregnancy results; If the woman had blood or protein in the urine, the pregnancy kit may give a false-positive result. This type of ectopic pregnancy is also known as a tubal pregnancy. A follow-up ultrasound may be needed after about 1 week if its early to verify the results. It happens when a person does not have COVID-19 but still tests positive for the disease. For instance, a false positive is when a drug test shows the presence of a medication or substance that you aren't actually taking. Journal of the American Medical Association. The drug most likely to cause a false positive reading on a pregnancy test is hCG, which is given to women undergoing fertility treatment to mature and release an egg from the ovary. But this is rare. If youve had a baby recently or a miscarriage, you may test positive for pregnancy. If you get a positive pregnancy reading, let your medical professional know, as they will want to assess and monitor your well-being. Several conditions may cause a false-positive pregnancy test. The kidney degrades the beta subunits to produce a core fragment. Drug Enforcement Administration. Diphenhydramine may cause a false positive result for some opioids and opiates. A false positive result is possible with a rapid COVID-19 test. after miscarriage, recent birth or termination) some rare ovarian cysts. This embryo will continue to produce hCG as long as it is in your body, but it will not develop into a fetus. Logan, B.K., et al. What is the most common cause of false positive hCG results? Ectopic pregnancy may also lead to a false positive test. Pediatric Emergency Care. What Can Cause a False Pregnancy Test? If you get a positive result you can almost certainly assume you are pregnant, at which point you should visit your GP to In such cases, the blood tests and ultrasound are done to confirm pregnancy. Gomila, I., et al. But how does this happen? (2015). Leaving the dipstick in your urine stream for the exact amount of time allotted is also important. Taking certain medicationsparticularly fertility medicationscan result in a false positive pregnancy test reading. A chemical pregnancy is a pregnancy, but an unhealthy one that results in an early miscarriage. If youre prescribed methylphenidate for ADHD, you shouldnt have to worry about having a positive drug result for amphetamines. False-positive TDxFLx urine amphetamine/metamphetamine II assay from ofloxacin. Why Did a Second Line Appear Later on My Pregnancy Test? It takes almost one to one-and-a-half months to have a normal level of hCG. Evaporation lines may show up on your test after your urine completely evaporates, usually within 10-30 minutes. Many urine drug tests test for the following medications and substances: THC, or tetrahydrocannabinol, an active ingredient in cannabis, Prescription opiates and opioids like oxycodone (Roxicodone, Oxycontin), hydrocodone, and morphine (MS Contin), Illegal opiates and opioids (like heroin), Amphetamines (like prescription amphetamines like Adderall and illegal methamphetamine), Barbiturates (like phenobarbital, butalbital), Benzodiazepines like alprazolam (Xanax) and lorazepam (Ativan). (n.d.). This can cause either a false negative or a false positive. ADHD Attention Deficit and Hyperactivity Disorders. WebWhat can cause a false urine pregnancy test? Some urine drug tests screen for a specific medication and substances. Phentermine is a prescription medicine that helps curb your appetite. CBD, which doesnt make you high, is used for medical marijuana to ease pain and other symptoms. Kale, N. (2019). Always consult a medical provider for diagnosis and treatment. Antiepileptic or Anticonvulsants: Drugs such as barbiturates, bromides, benzodiazepines, Theyre used to help treat fever, inflammation, and pain. Clinical Toxicology. Home pregnancy tests measure levels of human chorionic gonadotropin (hCG) hormone in urine. 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. Some states allow CBD oil, edibles, and other products to have up to 5% of the mind-altering chemical THC. Another NSAID, oxaprozin (Daypro), can be used to treat pain from arthritis. Urine drug tests look for the presence of specific substances. The human errors include using an expired test kit or not performing and analyzing the test results as per instructions. Blood tests can detect smaller amounts of hCG, confirming pregnancy earlier than a urine test. An evaporation line is the mark left by urine after it evaporates completely from the test. Your healthcare provider may request a urine drug test to make sure there arent other substances in your system that could be dangerous when combined with opioids. Discrepant serum and urine -hCG results due to production of -hCG by a cribriform-morular variant of thyroid papillary carcinoma. a recent pregnancy (e.g. MA. This material is provided for educational purposes only and is not intended for medical advice, diagnosis or treatment. False positive results on urine drug tests can happen. When this occurs, sometimes a minor surgical procedure called a dilation and curettage (D and C) is often required to remove the tissue, depending upon your symptoms and how far along the pregnancy was.

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