A phone or video consultation is sometimes required for legal purposes. Your primary care doctor should always know what medications you’re taking, including ED pills prescribed by another provider. There are many safe, reliable online services offering ED prescriptions. All PDE5 inhibitors, including Viagra and Cialis, require a valid prescription regardless of the pharmacy or provider. People with heart conditions should never take ED medications without consulting a doctor. Contact your medical provider if you experience any side effects during treatment.Levitra is a drug used to treat erectile dysfunction in men. This medication belongs to the class of drugs called phosphodiesterase type 5 inhibitors. You can buy this drug under the common brand name Vardenafil.  · Compare prices. Drug prices vary by pharmacy. Use GoodRx to find current prices and discounts. Get free coupons. GoodRx coupons can help you pay less than the cash price for your prescription. Show to your pharmacist. It’s easy. Just bring your free coupon to the pharmacy when picking up your prescription. Levitra (vardenafil): This medication is taken one hour before sex and can last up to 24 hours. It’s available in 10 mg and 20 mg tablets. Stendra (avanafil): This is an as-needed medication taken 30 minutes before sex and can last up to six hours. It’s available in 50 mg, mg, and mg tablets.