Antihistamines are medications given for the remedy of allergies. Prescription antihistamines are frequently recommended to treat seasonal allergies and hay fever. They block the chemical substance histamine that can trigger allergic reactions such as a runny nose, sneezing and itchy eyes. But not all of us know that prolong intake of these common drugs can lead to weight gain.
A new research done at the University of Yale shows that persons who take antihistamines are more likely to gain excess weight and be obese than those who don’t. The study involves the observation of the body weight of 268 antihistamine takers. 45% of the total no of users were found overweight. All in all, taking anti-allergies increases the risk of being obese or overweight.
The researchers however pointed out that, antihistamines don’t necessarily cause weight gain. It can also be that having allergies makes a person vulnerable to weight gain.
A more in depth explanation is that, our brain has antihistamine receptors. These receptors play a vital role in a person’s appetite and metabolism. People taking antihistamines maybe eating more and have a slowed down metabolism. And weight gain is, unfortunately, the unhappy end result.
Besides antihistamines, there are other medications that can cause gradual weight gain. These are anti-seizures, antidepressants, insulin, steroids and beta blockers. The weight gain can be gradual that some people may not even know why they are gaining weight and worse, it can be difficult to take the added pounds off.
For these reasons, many people ask if there are alternatives to antihistamines in treating allergies that do not cause weight gain. If you’re one of the people who experience weight gain from taking antihistamines, you can consult your doctor. He may advice you to use a steroid based nasal spray. This is quite effective in treating allergic rhinitis and it does not cause weight gain. Also, there are antihistamine eye drops that you can use for itchiness. Since it is not absorbed systematically to a significant degree, it will not cause weight gain.

