whereas 15 percent of those taking tadalafil 20 mg got a headache. Some side effects have the same likelihood in both doses, ...

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Both Cialis and tadalafil are prescription-only medications ... An on-demand dose is 10 or 20 mg, while a daily dose is 2.5 or 5 mg. You should always follow a doctor’s instructions when ...

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Background This multicenter, randomized, double-blind, double-dummy, placebo-controlled trial primarily evaluated the efficacy of tadalafil once-daily (OaD) or on-demand ("pro-re-nata"; PRN ...