A category of drugs that have less potential for abuse or addiction than Schedule II or I drugs. Among the substances so classified by the Drug Enforcement Agency are glutethimide and various analgesic compounds containing codeine. Any drug or therapeutic agent–commonly understood to include narcotics, with a potential for abuse or addiction, which is held under strict governmental control, as delineated by the Comprehensive Drug Abuse Prevention & Control Act passed in 1970 Schedule I drugs High abuse potential, no accepted medical use in US–Acetorphine, acetyl methadol, allyprodine, α—acetylmethadol, bufotenine, dextromoramide, diethyltryptamine, dimethyltryptamine–DMT, etorphine, heroin, ibogaine, ketobemidone, LSD–N, N-diethyl-D-lysergamide or lysergic acid diethylamide, marijuana, mescaline, PCP–phencyclidine, peyote, phenadoxone, phenampromide, racomoramide, tetrahydrocannibol Schedule II High abuse potential, potentially leading to severe psychologic or physical dependence; schedule II agents have acceptable medical uses, eg narcotics–alphaprodine, anileridine, cocaine, codeine, diphenoxylate, diprenorphine, etorphine HCl, ethymorphine, hydrocordone, hydromorphone, levorphanol, meperidine, methadone, morphine, oxymorphone, poppy straw concentrates, powdered opium, raw opium, thebaine and non-narcotics–amphetamine, amobarbital, methaqualone, methamphetamine, methaqualone, pentobarbital, percodan, phencyclidine, phenmetrazine, secobarbital Schedule III High abuse potential, moderate to low physical dependence, and high psychologic dependence potential, with acceptable medical uses, which may be narcotic–eg nalorphine, paregoric, or nonnarcotic–eg aprobarbital, benzphentamine, butabarbital, chlorphentermine, chlortermine, glutethimide, mazindol, methyprylon, phendimetrazine, probarbital, talbutal, thiamylal, thiopental, vinbarbital Schedule IV Minimal abuse potential, limited physical or psychological dependence potential, nonnarcotic, eg barbital, chloral hydrate, chlordiazepoxide, clonazepam, chlorazepate, dextropropoxyphene, diazepam, diethylpropion, ethchlorvynol, ethinamate, fenfluramine, lorazepam, mebutamate, methobarbital, meprobamate, methohexital, oxazepam, paraldehyde, phenobarbital, phentermine, prazepam Schedule V Very low abuse/dependence potential–eg brown mixture–opium, some codeine preparations, diphenozylate preparations–Lomotil, ethylmorphine-Cidicol, opium–Donnagel-PG, terpin hydrate, or non-narcotic, eg loperamide approved under the FDA's Subpart H regulations governing distribution, Orphan Medical has developed a system that makes Xyrem available to patients exclusively from a single source -- the SDS specialty pharmacy. with a few exceptions including Department of Corrections and licensed hospice facilities, in connection with specified surgical procedures in certain timeframes, in approved clinical trials and complimentary or sample controlled substances. metformina de 850 mg Generic Name: sildenafil Product Name: Viagra Viagra is used to treat erectile dysfunction, more commonly known as impotence, in men. Viagra belongs to a group of medicines called phosphodiesterase type 5 inhibitors (PDE5 inhibitors). This is when a man cannot get, or keep, a hard erect penis suitable for sexual activity. It works by relaxing the blood vessels in your penis when you are sexually excited. This medicine is available only with a doctor’s prescription. This allows blood to flow into your penis, allowing you to get an erection in a natural way. The physiological mechanism responsible for the erection of the penis involves the release of nitric oxide (NO) in the corpus cavernosum during sexual stimulation. NO then activates the enzyme, guanylate cyclase, which results in increased levels of cyclic guanosine monophosphate (c GMP), producing smooth muscle relaxation in the corpus cavernosum and allowing inflow of blood. Viagra tablets contain sildenafil (as citrate) equivalent to 25 mg, 50 mg or 100 mg sildenafil. 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Sildenafil (Revatio) is used to improve the ability to exercise in adults with pulmonary arterial hypertension (PAH; high blood pressure in the vessels carrying blood to the lungs, causing shortness of breath, dizziness, and tiredness). Children should not usually take sildenafil, but in some cases, a doctor may decide that sildenafil (Revatio) is the best medication to treat a child's condition. Sildenafil is in a class of medications called phosphodiesterase (PDE) inhibitors. Sildenafil treats erectile dysfunction by increasing blood flow to the penis during sexual stimulation. Sildenafil treats PAH by relaxing the blood vessels in the lungs to allow blood to flow easily. If you are taking sildenafil to treat erectile dysfunction, you should know that it does not cure erectile dysfunction or increase sexual desire. Sildenafil does not prevent pregnancy or the spread of sexually transmitted diseases such as human immunodeficiency virus (HIV). If these effects are mild, they may go away within a few days or a couple of weeks. If they’re more severe or don’t go away, talk to your doctor or pharmacist. Call your doctor right away if you have serious side effects. Call 911 if your symptoms feel life-threatening or if you think you’re having a medical emergency. Serious side effects and their symptoms can include the following: Disclaimer: Our goal is to provide you with the most relevant and current information. However, because drugs affect each person differently, we cannot guarantee that this information includes all possible side effects. This information is not a substitute for medical advice. 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Viagra tablets contain sildenafil as citrate equivalent to 25 mg, 50 mg or 100 mg sildenafil. Schedule of Viagra. Viagra is a prescription only medicine. Side effects of Viagra. Tell your doctor or pharmacist as soon as possible if you do not feel well while you are taking Viagra. While Viagra helps most people, it can cause some unwanted side effects in a few people. All medicines have side effects.