Do antihistamines cause weight gain?

Please don't ignore it if you're taking these long-term and noticing weight changes. I kept ignoring my sudden weight gain thinking it's just water, but it turned out to be a chronic allergy issue needing proper medical treatment. Go see a specialist instead of self-medicating daily.

Yes, long-term use of daily allergy tablets can cause a bit of weight gain because they increase your appetite. Try switching to a different non-drowsy formulation after asking your doctor.

Yes, some of them definitely make you feel hungrier and sluggish. It's a very common side effect.

I take them for seasonal allergies and noticed some bloating. If you have a busy desk job, try to track your snack breaks because these meds make you crave carbs when you are working late.

For regular sneezing, try doing steam inhalation with a drop of eucalyptus oil at night, it works wonders without any side effects. But if your allergies are very severe, don't experiment at home and let a proper doctor prescribe the safe medicine.