But, keep in mind that ED might signal an underlying medical problem, like high blood pressure, heart disease, diabetes, low testosterone, or sleep apnea. These medicines all work well for ED. Pearlman says it can often take months to get an appointment with a healthcare provider who can prescribe the medications commonly used to treat ED. Recent heart or blood vessel problems. These small differences affect the way each medication works, such as how quickly it takes effect and wears off, and the possible side effects. An inherited eye disease that affects the retina. Common ones include: Flushing of the skin.Some over-the-counter (OTC) supplements may help with erectile dysfunction, such as L-arginine in combination with pycnogenol, Korean red ginseng (also called panax . Viagra is a brand-name prescription drug that’s approved to treat erectile dysfunction (ED). With ED, you’re unable to have or maintain an erection. Viagra is approved for this use . Lemonaid Sildenafil Skip to review Best for bulk ordering Viagra and generic Viagra: Optum Store Viagra Best subscription service for Viagra and generic Viagra: Rex MD Viagra.