Do you have allergies? They could be the reason you’re gaining weight! If you’re taking an antihistamine to stop itchy, watery eyes and a runny nose, you’re blocking the neurotransmitter histamine AND a receptor that suppresses your appetite. So try eliminating allergy symptoms with a nasal allergy spray. Nasal meds work faster than pills and shut down allergy symptoms for 80% of people within hours. Plus, they don’t enter your bloodstream, so they don’t cause side effects like some pills.