If you are taking tadalafil to treat erectile dysfunction, follow your doctor’s directions and the guidelines in this paragraph. An OTC drug will help patients get treatment more quickly. Tell your doctor if tadalafil is not working well or if you are experiencing side effects. It belongs to the drug class known as PDE5 inhibitors. But, keep in mind that ED might signal an underlying medical problem, like high blood pressure, heart disease, diabetes, low testosterone, or sleep apnea. If you have certain health conditions or are taking certain medications, your doctor may tell you to take tadalafil less often or may prescribe a lower dose to be taken once a day. Other uses for this medicine This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.As needed for ED: 5 to 20 mg by mouth as a one-time dose, with a maximum of one dose in 24 hours. Effects may last up to 36 hours. Daily dosing for ED: or 5 mg by mouth daily. For daily dosing, the maximum dose is 5 mg per day. The medication should be taken once daily at about the same time every day to maintain a consistent level of. 1. It Targets the Problem and Works Quickly. Being a topical means MED targets your penis directly and offers a “quick onset of action,” Dr. Pearlman . AdHeute bestellen, morgen erhalten: Online-Rezept und gratis Lieferung innert 24 Stunden. Unser Online-Ärzteteam verspricht professionelle Beratung und gratis Express-Lieferung/5 (17K reviews).