Understanding Side Effect Specifics of Cialis: What You Need to Know https://powpill.com/2023/07/26/how-long-does-it-take-cialis-to-take-effect/ Cialis, known generically as tadalafil, belongs to a class of drugs called phosphodiesterase type 5 (PDE5) inhibitors. It's primarily used to treat erectile dysfunction by relaxing the muscles in the blood vessels and increasing blood flow to specific areas of the body, including the penis. This enhanced blood flow helps men achieve and sustain an erection, aiding in a satisfying sexual experience.