Modula 5 mg is a medication that contains tadalafil as its active ingredient. Tadalafil is a phosphodiesterase type 5 (PDE5) inhibitor used to treat erectile dysfunction (ED) in men. It works by increasing blood flow to the penis during sexual stimulation, helping men achieve and maintain an erection. Tadalafil is usually taken about 30 minutes to one hour before sexual activity. It has a longer duration of action compared to some other ED medications, and its effects can last for up to 36 hours.