Visit CVS Pharmacy to view or transfer a prescription, manage automatic refills, or to easily schedule a prescription pickup. Save time and money with CVS.An inherited eye disease that affects the retina. Sildenafil Viagra. If you prefer, you may contact the U. Severe liver disease. How oral medicines differ Each oral medicine for ED has a slightly different chemical makeup. Oral medicines for ED usually work well and cause few side effects. If you have an erection that lasts more than 4 hours, get medical help right away.Get drug information Search for a drug by name or NDC number and get complete drug information. It’s like the printout attached to your refill—only electronic. Help me find my info Search by name Search by NDC Enter medication name (Ex. “Lipitor”) Unsure what pill you have? Identify your drug based on shape, color or imprint. ID your medication. If you have these symptoms, stop taking VIAGRA and contact a doctor right away. have or have had heart problems such as a heart attack, irregular heartbeat, angina, chest pain, narrowing of the aortic valve, or heart failure. have low blood pressure, or high blood pressure that is not controlled. Viagra Dosage and Use Tips for First-Timers. Viagra dosage for erectile dysfunction (ED) is usually milligrams (mg), but those over 65 may start at 25 mg. Your doctor will also need to.Sildenafil Viagra. Patients should always ask their doctors for medical advice about adverse events. Medicines that you take by mouth are called oral medicines. If you experience chest pain, dizziness, or nausea during sex, seek immediate medical help. Side effects Side effects of oral ED medicines are often mild. Kidney disease that needs to be treated with dialysis.