The most common side effects of VIAGRA: headache; flushing; upset stomach; abnormal vision, such as changes in color vision such as having a blue color tinge and blurred vision; stuffy or runny nose; back pain; muscle pain; nausea; dizziness; rash. Box , Mission, KS If your pharmacy does not participate, you may be able to submit a request for a rebate in connection with this Savings Offer. If you have an erection that lasts more than 4 hours, get medical help right away. If you are taking sildenafil to treat PAH, you will probably take sildenafil three times a day with or without food. The four main medicines taken by mouth for erectile dysfunction are: Avanafil Stendra. Sildenafil treats PAH by relaxing the blood vessels in the lungs to allow blood to flow easily. Do not take more or less of it or take it more often than prescribed by your doctor.CHOOSE BRAND-NAME VIAGRA. The original little blue pill prescribed by doctors for over 20 years. Clinically proven to treat men with erectile dysfunction (ED) Ongoing . Learn about uses, how it works, and more for Viagra (sildenafil). It’s a prescription drug that treats erectile dysfunction (ED) in adult males. Sildenafil (Viagra) is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. Sildenafil (Liqrev, Revatio) is used to improve the ability to exercise in .
