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Concomitant use of LEVITRA and nitrates and nitric oxide donors is contraindicated. These effects were not observed when LEVITRA 20 mg was taken 24 hours before the nitroglycerin (NTG). Long-term safety information is not available on the concomitant administration of vardenafil with HIV protease inhibitors. Concomitant administration with ritonavir or indinavir substantially increases plasma concentrations of vardenafil. To decrease the chance of adverse events in patients concomitantly taking ritonavir or indinavir, which are strong inhibitors of CYP3A4 metabolism, buy xanax without prescrition a maximum single dose of 2.5 mg LEVITRA should not be exceeded.
To start your free online consultation please select the treatment you require from the options below. If you have not taken Levitra before the recommended starting dose is 10mg. In cases of overdose, standard supportive measures should be taken as required.
Because ritonavir prolongs LEVITRA elimination half-life (5-6-fold), no more than a single 2.5 mg dose of LEVITRA should be taken in a 72-hour period by patients also taking ritonavir. Patients taking indinavir, ketoconazole 400 mg daily, or itraconazole 400 mg daily should not exceed LEVITRA 2.5 mg once daily. For patients taking ketoconazole or itraconazole 200 mg daily, a single dose of 5 mg LEVITRA should not be exceeded in a 24-hour period (see PRECAUTIONS, Drug Interactions and DOSAGE AND ADMINISTRATION).
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This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval. Vardenafil can decrease blood flow to the optic nerve of the eye, causing sudden vision loss.
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Levitra relaxes blood vessel wall muscles and increases blood flow to the penis. This will assist a man in obtaining and maintaining an erection. Levitra can be purchased in the United Kingdom from Meds For Less. Levitra works by increasing blood flow to the penile erectile tissue.

Rather than attempt to schedule an appointment with your primary care physician and travel to a local pharmacy, UPGUYS streamlines the process. Like most medications, you should store Levitra in a cool, dry environment. You don't want to expose Levitra to direct sunlight or humidity. Some great locations you can store Levitra are kitchen cabinets or medicine drawers.
Physicians should inform their patients that concomitant use of LEVITRA with alpha-blockers is contraindicated because co-administration can produce hypotension (e.g. fainting). Patients prescribed LEVITRA who are taking alpha-blockers should be started on the lowest recommended starting dose of LEVITRA (see Drug Interactiona and DOSAGE AND ADMINISTRATION). Patients should be advised of the possible occurrence of symptoms related to postural hypotension and appropriate countermeasures. Patients should be advised to contact the prescribing physician if other anti-hypertensive drugs or new medications that may interact with LEVITRA are prescribed by another healthcare provider. A past history of heart disease and stroke would mean vardenafil is unlikely to be a safe choice. There are some types of medication which interact with vardenafil and the other PDE5 inhibitors, for example drugs used to treat angina and heart disease such as nitrates.
Compared to Sildenafil, Vardenafil can be effective for five to eight hours, after which it remains active in the body but the effects are substantially weakened. A standard dose of Vardenafil has an onset time of about one hour. G Flexible dose studies started all patients at LEVITRA 10 mg and allowed decrease in dose to 5 mg or increase in dose to 20 mg based on side effects and efficacy.
This has occurred in a small number of people, most of whom also had heart disease, diabetes, high blood pressure, high cholesterol, or certain pre-existing eye problems, and in those who smoked or were over 50 years old. It is not clear whether vardenafil is the actual cause of vision loss. Administration of LEVITRA with nitrates (either regularly and/or intermittently) and nitric oxide donors is contraindicated [see CLINICAL PHARMACOLOGY].
None of these PDE-5 inhibitors should be used more than once a day. During sexual activity, if you become dizzy or nauseated, or have pain, numbness, or tingling in your chest, arms, neck, or jaw, stop and call your doctor right away. Stop using this medicine and get emergency medical help if you have sudden vision loss. Levitra is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. Depending on your age, height and weight, the cause and the severity of your ED, you may be prescribed a lower dose of 5mg, or a higher one of 20mg.