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Cialis (tadalafil) is a prescription phosphodiesterase inhibitor intended for patients suffering from the repeated inability to have an erection hard enough to complete sexual intercourse. Cialis comes in regular and sublingual tablets (Cialis Soft Tabs) that dissolve under your tongue and become efficient several times faster than any other ED treatment medicines. You should not take this medicine more often than every 24 hours – but you are unlikely to have such a necessity as Cialis provides for up to 36 hours of efficiency. If you have to take this medicine regularly make sure you take it at the same every day to remember better. Your doctor will need to know whether there are any other medicines you are taking – by prescription or the ones that you purchased online.

Make sure the following drugs you are taking are mentioned to make sure your doctor can adjust the dosage of Cialis and make it effective for you: erythromycin, metronidazole HIV protease inhibitors, high blood pressure medications, nevirapine, phenobarbital, fluvoxamine, antifungals, alpha blockers, cyclosporine, delavirdine, isoniazid, ritonavir, diltiazem, dexamethasone, cimetidine, clarithromycin, ethosuximide, lovastatin, erectile dysfunction drugs, rifabutin, verapamil, zafirlukast, sertraline, troleandomycin, phenytoin, rifampin, nefazodone, and fluoxetine. Some serious side effects have been reported by people taking Cialis. These may include ringing in the ears, dizziness, hives, rash, blurred vision, sudden decrease in hearing, sudden decrease in vision, and erection lasting for longer than 4 hours.