Modula 5 mg contains tadalafil 5 mg, a PDE-5 inhibitor. It is mainly used for: Erectile dysfunction (ED): helps increase blood flow to the ***** during ***** stimulation, making it easier to achieve and maintain an erection. Benign prostatic hyperplasia (BPH): can relax muscles in the prostate and bladder and improve urinary symptoms such as weak flow, urgency, and frequent urination. 1 1mg +1 The 5 mg strength is commonly used as a once-daily regimen when prescribed for ED or BPH, rather than as the higher 10–20 mg dose used when tadalafil is taken only as needed. A Apollo Pharmacy Important: Don't take Modula with nitrates (such as nitroglycerin/GTN or isosorbide), because the combination can cause a dangerous drop in blood pressure. It can also interact with alpha-blockers and other blood-pressure medicines. A Apollo Pharmacy +1 If you're considering Modula 5 mg for ED, I can explain the difference between daily 5 mg tadalafil and taking 10/20 mg only when needed.