Does Cyproheptadine Cause Shortness Of Breath?

Does Cyproheptadine Cause Shortness Of Breath? A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing. What are the side effects of cyproheptadine? dry mouth, nose, and throat.