Yes. Even though they are uncommon, Tadalafil may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away: headache, indigestion or heartburn, nausea, diarrhea, flushing, pain in the stomach, back, muscles, arms or legs, cough. Some side effects can be serious. If you experience any of these symptoms, call your doctor immediately or get emergency medical treatment: sudden decrease or loss of vision (see below for more information) blurred vision changes in color vision (seeing a blue tinge on objects or having difficulty telling the difference between blue and green) sudden decrease or loss of hearing (see below for more information) ringing in ears, erection that lasts longer than 4 hours, dizziness, chest pain, hives, rash, difficulty breathing or swallowing, swelling of the face, throat, tongue, lips, eyes, hands, feet, ankles, or lower legs, blistering or peeling of skin. Everyone responds differently to medications and treatments, so If you have any symptoms or concerns please contact us at support@peakscurative.com