Vardenafil usually works for 4 to 5 hours. They have the same benefits and risks as their brand-name counterparts. When choosing one, tell your doctor or other health care professional what your preferences are, such as cost, ease of use, how long the drug’s effects last and side effects. These small differences affect the way each medication works, such as how quickly it takes effect and wears off, and the possible side effects. Note that Viagra is only available in three doses: 25 mg, 50 mg, and mg. You’ll also need to fill out a medical questionnaire with answers about your medical history, current medications, and lifestyle habits.Real Doctors · Free Shipping · Discreet Packaging · Personalized PlanGeneric Viagra – $ · Cialis Daily – $ · Tadalafil – $ Have an accurate diagnosis and prescription: Remember that Viagra and generic sildenafil are not available over the counter — you will need a prescription. Some . Same Day Rx Delivery · Convenient Locations · Hour Locations · Rx Savings Finder.