CVS – Online Drugstore, Pharmacy, Prescriptions & Health Information. Refill and transfer prescriptions online or find a CVS Pharmacy near you. Shop online, see ExtraCare .Other uses for this medicine This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information. These medicines all work well for ED. The four main medicines taken by mouth for erectile dysfunction are: Avanafil Stendra. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Medicines that you take by mouth are called oral medicines. These small differences affect the way each medication works, such as how quickly it takes effect and wears off, and the possible side effects. This boosts blood flow and helps you get an erection from sexual activity.Sildenafil is in a class of medications called phosphodiesterase (PDE) inhibitors. Sildenafil treats erectile dysfunction by increasing blood flow to the penis during sexual stimulation. . CVS – Online Drugstore, Pharmacy, Prescriptions & Health Information. Refill and transfer prescriptions online or find a CVS Pharmacy near you. Shop online, see ExtraCare . Explore Virtual Care. Loading MinuteClinic can treat over different conditions. Find a walk in location near you g: sildenafil.Often, these are prescribed for chest pain called angina. If you are taking sildenafil for erectile dysfunction, your doctor will probably start you on an average dose of sildenafil and increase or decrease your dose depending on your response to the medication. Your doctor or other health care professional can recommend one for you based on these factors, other health conditions you have and any other medicines you take. These medicines all work well for ED. An inherited eye disease that affects the retina. They include dutasteride Avodart, Jalyn and finasteride Propecia, Proscar.