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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. The maximum recommended dosing frequency is once per day. Sexual stimulation is required for a response to treatment. cialis online pharmacy How common is erectile dysfunction?

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Tadalafil is principally metabolised by CYP3A4. A selective inhibitor of CYP3A4, ketoconazole (200 mg daily), increased tadalafil (10 mg) exposure (AUC) 2-fold and Cmax by 15%, relative to the AUC and Cmax values for tadalafil alone. Ketoconazole (400 mg daily) increased tadalafil (20 mg) exposure (AUC) 4-fold and Cmax by 22%. Ritonavir, a protease inhibitor (200 mg twice daily), which is an inhibitor of CYP3A4, CYP2C9, CYP2C19, and CYP2D6, increased tadalafil (20 mg) exposure (AUC) 2-fold with no change in Cmax. Although specific interactions have not been studied, other protease inhibitors, such as saquinavir, and other CYP3A4 inhibitors, such as erythromycin, clarithromycin, itraconazole, and grapefruit juice, should be co-administered with caution, as they would be expected to increase plasma concentrations of tadalafil (see section 4.4). Consequently, the incidence of the adverse reactions listed in section 4.8 might be increased. mxman review Drink prudently when taking Viagra. Alcohol and Viagra share major side effects - dizziness, headaches, upset stomach - and combining them only intensifies these effects.Taking Viagra twice a day is not necessarily a problem for some people. For example, they have dosage forms in 25 mg, 50 mg, and 100 mg. Obviously, if someone were to take a 25 mg tablet once in the morning and once at night, they would not be exceeding maximum daily dosage. I will say that it is important to use the lowest effective dose possible when using this medication, and it is important to use it "sparingly" (only when you need it). There have been some patients that have built a tolerance to this medication and have found that even though they were able to get an erection before utilizing it, they no longer are able to do so without the assistance of the ED medication. In addition, this medication is very similar to nitroglycerin with regard to what it does to the circulatory system, for obvious reason, taking a medication such as this off and on off and on haphazardly can have some potential rebound effects. I hope that helps answer your question. ? stomach discomfort, upset, or painPriapism

Store Viagra? at room temperature between 59 and 86 degrees F (15-30 degrees C) away from light and moisture. All prescription medications must be kept out of reach of children. What should I tell my doctor before I take the first dose of Viagra? cialis 5 mg daily diarrhoea

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Vardenafil HCl is a nearly colorless, solid substance with a molecular weight of 579.1 g/mol and a solubility of 0.11 mg/mL in water.Take 1 LEVITRA tablet about 1 hour (60 minutes) before sexual activity. Some form of sexual stimulation is needed for an erection to happen with LEVITRA. LEVITRA may be taken with or without meals. GENERIC CIALIS