How oral medicines differ Each oral medicine for ED has a slightly different chemical makeup. Side effects Side effects of oral ED medicines are often mild. Some examples of nitrates are nitroglycerin Nitro-Dur, Nitrostat, others , isosorbide mononitrate Monoket and isosorbide dinitrate Bidil. Avanafil Stendra. These small differences affect the way each medication works, such as how quickly it takes effect and wears off, and the possible side effects. Although the FDA says people are not allowed to bring prescription drugs into the United States except in rare cases, dozens of cities, county governments, and school districts help their employees buy drugs from abroad. Alpha-blockers are sometimes prescribed for prostate problems or high blood pressure.Viagra, Cialis most popular fakes seized. John P. Leonard is the No. 2 trade official at Customs and Border Protection. U.S. Customs and Border Protection. A year veteran . Though there is no proof linking the man’s death to the drug, FDA officials say that a traditional doctor-patient relationship, along with a physical examination, may have . So that means giving your prescription drugs to your friend could make you guilty of distributing (or even intending to distribute) prescription medications without proper .