Cialis Generic is a tadalafil-based medication used for treatment of erectile dysfunction in men. This medication is a selective reversible inhibitor of PDE5; it interacts with nitric oxide released during sexual stimulation and increases cGMP levels in the cavernous body of penis that leads to smooth muscles relaxation and increases blood flow into the penis causing erection.

It is not recommended to take Cialis Generic more than once daily, not less than 16 minutes before expected sexual activity because its action lasts for about 36 hours so taking another dose might lead to unpleasant or dangerous effects.

Side effects of Cialis Generic might include:

• nausea, upset stomach, diarrhea;
• facial redness, headache and diverse flu-like symptoms;
• blurred vision or changed color perception;
• sometimes low blood pressure;
• abnormal ejaculation or priapism (prolonged and painful erection that must be reported to a doctor if does not disappear for more than 4 hours, otherwise it may cause damage to the penis).

To decrease the risk of developing side effects, it is required that your doctor authorized treatment with Cialis Generic if you:

• have congenital defects or curved penis;
• suffer from diabetes, liver/heart/vessels conditions, stomach ulcer, hypo- or hypertension, hyperlipidemia, or sickle-cell anemia;
• are a smoker, as smoking tobacco during treatment with Cialis Generic may cause sudden optic nerve-related vision loss;
• are exposed to or taking any organic nitrates as it may cause severe hypotension that might be dangerous;
• are taking medications or substances containing terazosin, saquinavir, itraconazole, pentaerythritol tetranitrate, erythrityl tetranitrate, nitroglycerin, erythromycin, ketoconazole, atazanavir, bunazosin, doxazosin, itraconazole, moxisylyte, indinavir, phenoxybenzamine, trimazosin, urapidil, telithromycin, phentolamine, nefazodone or ritonavir.

Overdose of Cialis causes symptoms similar to its side effects listed above. If you develop any of them and there is a possibility you have taken a double or extra dose of the medication, inform your doctor immediately.