Yes, ED pills can cause side effects. Make sure to get an estimate of when you can expect your prescription in the mail. These PDE5 inhibitors may cause headache, flushing, drop in blood pressure, or other adverse effects. Contact your medical provider if you experience any side effects during treatment. Generic vs. More serious side effects may include a drop in blood pressure or an erection that lasts longer than four hours. However, others work on a cash-pay basis and don’t partner with insurance companies.If you’re interested in oral ED medication, these are your 4 options. Viagra (sildenafil) Cialis and Cialis Daily (tadalafil) Levitra, Staxyn (vardenafil) Stendra (avanafil) Each of the generics contains the same active ingredients in the same concentrations as the higher-cost, branded medications. • LEVITRA is taken as needed: For most patients, the starting dose is 10 mg, up to once daily. Increase to 20 mg or decrease to 5 mg based on efficacy/tolerability. () • A starting dose of 5 mg LEVITRA should be considered in patients ≥65 years of age. () • LEVITRA is taken orally, approximately 60 minutes before sexual activity. It is available in brand and generic versions. Generic levetiracetam is covered by most Medicare and insurance plans, but some pharmacy coupons or cash prices may be lower. Get levetiracetam for as low as $, which is 89% off the average retail price of $ for the most common version, by using a GoodRx coupon.