New Zealand Sildenafil was reclassified in New Zealand in so it could be bought over the counter from a pharmacist. The patent on Revatio indicated for pulmonary arterial hypertension rather than erectile dysfunction expired in late 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. The patent was published in and expired in The products discussed in this site may have different product labeling in different countries. Egypt Egypt approved Viagra for sale in , but soon afterwards allowed local companies to produce generic versions of the drug, citing the interests of poor people who would not be able to afford Pfizer’s price. This patent was published in and expired in 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 commitment to product quality and safety monitoring. The products on this page have been transferred to VIATRIS SPECIALTY LLC. The U.S. Physician Prescribing Information and Patient Information on this page may no longer be current. Please visit for the most current product information. for Consumers: VIAGRA en Español. Sildenafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED). In combination with sexual stimulation, sildenafil works by increasing blood flow to the penis to.