New Zealand Sildenafil was reclassified in New Zealand in so it could be bought over the counter from a pharmacist. While the sale remains subject to a consultation with a pharmacist, the other restrictions from the trial have been removed, allowing customers over the age of 18 to purchase an unlimited number of pills. Some people may also have ringing in their ears tinnitus or dizziness. The first document guaranteed sole production and sale of the substance until , while the second gave Pfizer the exclusive use to treating erectile dysfunction with sildenafil until The Korean Court system made a ruling against Pfizer in June , allowing for the unhindered domestic production of generic prescription sildenafil. The information provided is for educational purposes only and is not intended to replace discussions with a healthcare provider.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. 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 test1.ru for the most current product information. for Consumers: test1.ru VIAGRA en Español. What to consider Cost Overdose Ask your doctor Q&A Drug Images What is Viagra? If you have erectile dysfunction (ED), your doctor may recommend that you take Viagra. It’s a prescription drug.