Yes, ED pills can cause side effects. Insurance: If you plan to use insurance, make sure the online provider accepts it. Both options require valid medical documentation, but some online services only require a health questionnaire to be filled out and reviewed for approval—meaning no face-to-face video interaction is needed. It lasts 4 to 5 hours, or longer if you have mild to moderate ED. People with heart conditions should never take ED medications without consulting a doctor. The generic versions are just as effective and much less expensive. Some services offer a subscription option where they’ll send your medications every month at a discount.AdDon’t go to the pharmacy without checking prices at GoodRx® first. No commitment or fees. Find the lowest price in your neighborhood & use our free coupons to save up to 80%Service catalog: Prescription Coupons, Prescription Discounts, Online Doct.  · Sildenafil is used to treat men who have erectile dysfunction (also called sexual impotence). Sildenafil belongs to a group of medicines called phosphodiesterase 5 (PDE5) inhibitors. These medicines prevent an enzyme called phosphodiesterase type-5 from working too quickly. The penis is one of the areas where this enzyme works. Generic Viagra (sildenafil): $4 per 25 mg pill, $6 per 50 mg pill, $10 per mg pill; Branded Viagra: $90 per 25 mg, 50 mg, or mg pill; Generic Cialis (tadalafil): $11 per 5 mg pill, $44 per 10 mg or 20 mg pill; Generic Cialis Daily (tadalafil): $8 per mg or 5 .