He is an assistant clinical professor at the University of California, San Francisco School of Medicine and currently practices at Central Coast Allergy and Asthma in Salinas, California.Sanja Jelic, MD is board-certified in pulmonary disease, sleep medicine, critical care medicine, and internal medicine. The researchers theorized that antihistamines have a similar chemical structure to certain psychiatric drugs that are known to be associated with weight gain. But sometimes our bodies produce too much histamine in response to a harmless allergen, like pollen, leaving you with a runny nose and itchy eyes. Unfortunately, all drugs have side effects, and weight gain is common to many drugs. Therefore antihistamines use is simply a marker for allergies, not the cause of the weight gain. Antihistamines are oral medications that are commonly used to treat symptoms of allergic rhinitis and allergic conjunctivitis. Antihistamines are particularly good at treating allergy symptoms such as sneezing, runny nose, and itchy, watery eyes. Responses (2) JO. Read our Alternatively, obesity is considered to be an inflammatory condition that makes a person more prone to problems such as allergies. Benadryl is an antihistamine, so yes, taking Benadryl all the time could likely lead to weigh gain. This can be even more frustrating when other options exist that do not cause this nasty side effect. zyprexa17 Member Posts: 10 Member Member Posts: 10 Member. She is an assistant professor and attending physician at Columbia University College of Physicians and Surgeons in New York, NYDo You Take an Antihistamine for Your Nasal Allergies?Benefits and Side Effects of Treating Hives or Allergies With ZyrtecUsing Over-the-Counter Medication for Your Allergy Symptoms window during this time. Answer this question. These biological changes result in increased appetite, overeating, slower fat breakdown and weight gain. Our bodies need histamine. This past summer I felt like I could probably lose a few, but nothing major. Ⓒ 2020 About, Inc. (Dotdash) — All rights reserved If antihistamines make you drowsy, your decreased energy levels could result in less exercise and more weight gain. If you come in contact with an allergen, histamine helps your body get rid of it. I have read that it causes bloating. Asked 24 Mar 2010 by migg411 Updated 11 November 2010 Topics diphenhydramine, weight. They work by blocking the actions of histamine, a chemical released by your body's mast cells. can ambien cr cause weight gain. migg411 25 Mar 2010. cause i take it with ambien and ever since i … Verywell Health uses cookies to provide you with a great user experience. Votes: +0. While antihistamines are considered a relatively safe medication, they can come with side effects, including the possibility of weight gain. I read something online about benadryl causing weight gain, so I decided to switch to Claritin D. It's been a week and I've lost 4.5 pounds. If you have weight gain while taking Benadryl, talk with your doctor or pharmacist about other medication options. Weight gain is not common side effect for Diphenhydramine. Our bodies need histamine. Antihistamines are oral medications that are commonly used to treat symptoms of JohnySmith 24 Mar 2010. During the month of July, I started getting hives regularly and then shortly after, its nice to here u r not alone not that u gained sory about that. Ⓒ 2020 About, Inc. (Dotdash) — All rights reservedDaniel More, MD, is a board-certified allergist and clinical immunologist. MI. July 22, 2017 8:10PM. The reasons for this weren't clear, and it's important to note that this association doesn't mean that antihistamines directly cause weight gain. Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Sign up for our Health Tip of the Day newsletter, and receive daily tips that will help you live your healthiest life.Ratliff JC, Barber JA, Palmese LB, Reutenauer EL, Tek C. Couluris M, Mayer J, Freyer D, Sandler E, Xu P, Krischer J. Doctors often do not address this when prescribing medicine, despite weight gain being very troubling for the patient. Can diphenhydramie cause you to gain weight? Here is a list of commonly used drugs associated with weight gain: 1) Benadryl Select one or more newsletters to continue. Replies. That's where antihistamines can help. Anecdotally, people using Xyzal (levocetirizine)—an antihistamine similar to Zyrtec (cetirizine)—they have noticed they have put on extra pounds, which is what a very small percentage of patients who used the drug during trials experienced. Antihistamines that can cause weight gain include: Diphenhydramine (Benadryl and others) Cetirizine (Zyrtec) Levocetirizine (Xyzal) Fexofenadine (Allegra) “These medications tend to cause insomnia, increased appetite, and water retention,” she says—a perfect storm for weight gain. I just wanted to let y'all know in case someone else is having a similar problem. Benadryl is the brand name given to the drug diphenhydramine, most commonly used as an antihistamine for those suffering from allergy symptoms such as runny nose, itchy eyes and a sore throat 2. Available for Android and iOS devices. 4. However, the drug is also used to help reduce dizziness, nausea and vomiting caused by motion sickness (e.g., carsickness, airsickness or seasickness). me to ive never gain and al asuden i a year im 150 over well im glade im not crazey every one tell me i am and to diet, stop eating and i dont even eat enything well thanksStill looking for answers?