How it works:
1. Stopping Allergic Reactions (Histamine Blocker)
- The Target: It binds to H1 histamine receptors [1].
- The Action: When your body encounters an allergen (like pollen), it releases a chemical called histamine. Histamine attaches to cells and causes swelling, itching, mucus, and watery eyes.
- The Result: Cyproheptadine blocks these receptors, preventing histamine from attaching [1]. This stops allergy symptoms like sneezing, runny nose, and hives.
2. Boosting Appetite (Serotonin Blocker)
- The Target: It binds to 5-HT2 serotonin receptors in the brain [1, 2].
- The Action: Serotonin is a brain chemical that, among other things, signals your body when you are full and should stop eating.
- The Result: By blocking serotonin in the appetite control center of the brain (the hypothalamus), cyproheptadine prevents the “fullness” signal [1]. This significantly increases your desire to eat and stimulates hunger.

