However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. How can I buy tadalafil? Cialis will be available as oral tablets in 5mg, 10mg and 20mg strengths. Other uses for this medicine This medication may be prescribed for other uses; ask your doctor or pharmacist for more information. There are two different ways to take tadalafil, either daily or on an as needed basis.It’s approved to: treat erectile dysfunction (ED) manage symptoms of benign prostatic hyperplasia (BPH), or. treat ED and manage symptoms of BPH together. For more . Cialis is Food and Drug Administration (FDA) approved to treat erectile dysfunction (ED) and benign prostatic hyperplasia (BHP). Generic tadalafil became more widely available . We have good news for you: generic Cialis, used to treat erectile dysfunction (ED) and enlarged prostates, just hit pharmacies. Prices for the generic, Welcome! You’re in .