Vardenafil was co-marketed by Bayer Pharmaceuticals, Glaxo Smith Kline, and Schering-Plough under the trade name Levitra. As of 2005, the co-promotion rights of GSK on Levitra have been returned to Bayer in many markets outside the U. In Italy, Bayer sells vardenafil as Levitra and GSK sells it as Vivanza. Thus, because of European Union trade rules, parallel imports might result in Vivanza sold next to Levitra in the EU. An orally disintegrating form, marketed as Staxyn and Levitra Soft, has been gaining approvals in countries such as the United States inhibitors; it is closely related in function to sildenafil citrate (Viagra) and tadalafil (Cialis). The difference between the vardenafil molecule and sildenafil citrate is a nitrogen atom's position and the change of sildenafil's piperazine ring methyl group to an ethyl group. Tadalafil is structurally different from both sildenafil and vardenafil. Vardenafil's relatively short effective time is comparable to but somewhat longer than sildenafil's. doxycycline stomach Film-coated tablet: 10 mg PO ~1 hour before sexual activity; may be increased to 20 mg or reduced to 5 mg, depending on effectiveness and tolerance; not to exceed 1 dose/day Orally disintegrating tablet (ODT): 10 mg PO placed on tongue ~1 hour before sexual activity; not to exceed 1 dose/day 10-mg ODT not interchangeable with 10-mg film-coated tablet; ODT provides higher systemic exposure at same dose; if higher or lower doses are required, film-coated tablet should be prescribed Anatomic deformation of penis, cardiovascular disease, left ventricular outflow obstruction, bleeding disorders, active peptic ulcer disease, liver disease, renal impairment, multidrug antihypertensive regimens, retinitis pigmentosa, conditions predisposing to priapism, concomitant use of CYP3A4 inhibitors Avoid in patients with congenital QT prolongation or those taking class IA or III antiarrhythmics Use in combination with other treatment for erectile dysfunction has not been studied and is not recommended Not to be taken with other phosphodiesterase (PDE)-5 inhibitors (eg, sildenafil, tadalafil) Concomitant use of alpha blockers increases risk of hypotension May increase risk of rare sudden vision loss attributed to nonarteritic ischemic optic neuropathy; if vision problems arise, discontinue, and contact physician Risk of sudden hearing loss Sexual stimulation causes nitric oxide to be released in corpus cavernosum, and nitric oxide activates guanylate cyclase, which in turn increases cyclic guanosine monophosphate (c GMP), thus causing smooth-muscle relaxation; PDE-5 inhibitors enhance smooth muscle-relaxing effects of nitric oxide in corpus cavernosum by inhibiting degradation of c GMP The above information is provided for general informational and educational purposes only. Individual plans may vary and formulary information changes. Contact the applicable plan provider for the most current information. Where to buy viagra online uk Buy cheap tetracycline online Clonidine opiate LEVITRA prescription and dosage sizes information for physicians and healthcare professionals. Pharmacology, adverse reactions, warnings and side effects. viagra tablets online purchase in india LEVITRA should be used with caution by patients with anatomical deformation of the penis such as angulation, cavernosal fibrosis, or Peyronie’s disease or by patients who have conditions that may predispose them to priapism such. as sickle cell anemia, multiple myeloma, or leukemia. For most patients, the recommended starting dose of LEVITRA is 10 mg, taken orally, as needed, approximately 60 minutes before sexual activity. The dose may be increased to a maximum recommended dose of 20 mg or decreased to 5 mg based on efficacy and side effects. This is not a list of all drugs or health problems that interact with Levitra (vardenafil tablets). Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take Levitra (vardenafil tablets) with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor. WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect: All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Vardenafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED). In combination with sexual stimulation, vardenafil works by increasing blood flow to the penis to help a man get and keep an erection. This drug does not protect against sexually transmitted diseases (such as HIV, hepatitis B, gonorrhea, syphilis). Consult your doctor or pharmacist for more details. Read the Patient Information Leaflet provided by your pharmacist before you start taking vardenafil and each time you get a refill. If you have any questions, ask your doctor or pharmacist. Take this medication by mouth as directed by your doctor, usually as needed. The dosage is based on your medical condition, response to treatment, and other medications you may be taking. Take vardenafil, with or without food, about 1 hour before sexual activity. Be sure to tell your doctor and pharmacist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products). 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Levitra 5 mg film-coated tablets 5.926 mg of vardenafil hydrochloride trihydrate. No indication for genotoxic/mutagenic activity of vardenafil was found using.