If you prefer, you may contact the U. An interaction between two medications does not always mean that you must stop taking one of them. Rarely reported side effects include: an erection that will not go away priapism. 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. Seniors: If you are 65 years of age or older, you may need a lower dose of Viagra Sildenafil. The most common side effects of Viagra include nausea, indigestion, abdominal pain, vomiting, facial flushing, headache, dry, stuffy or swollen nose, dizziness, dry throat, throat tightness, decreased sensitivity of mouth, drowsiness, increased erection, pain in arms and legs and muscle pain.Your prescription may have been filled with a generic version instead of brand-name VIAGRA. Follow the steps below to help ensure you receive the brand name your doctor prescribed and, if eligible, save on your prescription. Ask Your Doctor. That’s compared with more than $50 per pill for Viagra. And while generic Revatio is available only in a mg strength—Viagra comes in , , and mg tabs—not to worry: Your doctor can. The medication Viagra is manufactured by Pfizer Canada Inc and it comes in 25 mg, 50 mg and mg dosage forms in a blister pack of 4 tablets. We are supplying brand Viagra in quantities of 8 tablets, which will be 2 blisters pack of 4 pills. The generic form of Viagra (Sildenafil) is available in dosage forms of 25 mg, 50 mg and mg. We.