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Do not take Cialis 20mg if you are also using a nitrate drug for chest pain or heart problems, including nitroglycerin, isosorbide dinitrate, isosorbide mononitrate, and some recreational drugs such as "poppers." Taking tadalafil with a nitrate drug can cause a sudden and severe decrease in blood pressure.

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Keep taking Tadalafil 20mg (tadalafil tablets) as you have been told by your doctor or other health care provider, even if you feel well.

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Cialis Generic benefits from having a long duration of action. Viagra remains active for about 4 hours, Levitra for 4-5 hours, and Cialis for 36 hours – hence its familiar name 'The Weekend Pill'. Erections will not be continuous during 36 hours after taking Cialis, occurring only at times of arousal during those 36 hours.