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Systemic exposure (based on AUC) at no-observed-adverse-effect-level (NOAEL) (10 mg/kg/day) for unbound tadalafil was similar to that expected in humans at the MRHD of 20 mg. Administration of CIALIS to patients who are using any form of organic nitrate, is contraindicated.In clinical pharmacology studies, CIALIS was shown to potentiate the hypotensive effect of nitrates. In some cases, using these medications may mean you need to completely avoid PDE5 inhibitors. In other cases, your doctor or a healthcare professional may adjust your medication dosage, which can help lower the possibility of drug interactions while using PDE5 inhibitors. Many people who take Cialis prefer this dosing because it provides flexibility for the timing of sexual activity. Don’t take more than one dose per day to avoid the risk of a prolonged, painful erection (priapism), drop in blood pressure, or other serious side effects.
Men who regularly require Cialis more than twice a week sometimes prefer to take a lower dose 2.5mg or 5mg tablet each day, at the same time of day. These low dose tablets are specifically for daily use and provide a continuous level of treatment. Although sildenafil and tadalafil are different drugs that both block PDE5, they do not complement each other. In fact,