Cialis is an erectile dysfunction treatment drug that works by increasing the blood flow to the penis. As a result the patient is able to achieve an erection and keep it long enough to complete a sexual intercourse. You may experience some of the mild side effects of this drug when starting to take it. These include upset stomach symptoms and dizziness. In some cases the patients report back ache and muscle ache. Make sure you don't take alcohol in excess - drinking just 5 glasses of wine, for example, is unlikely to do any harm, while having more will probably worsen your side effects and cause dizziness, heart rate change, low blood pressure, or give you a headache.
In very rare cases patients experience decreased blood flow to the optic nerve, as a result of which sudden vision loss may occur. However, it's not completely clear whether this is related to Cialis or has to do with a number of reasons (people most often affected are usually older than 50, smoke, have a history of heart disease, high blood pressure, high cholesterol or have a pre-existing eye problem). In case of experiencing any symptoms that are developing or are bothersome contact your doctor, or seek medical help to prevent further complications. Do not share this medicine with those to whom it was not prescribed. Keep out of the reach of children.