The drug generically named tadalafil is marketed within the United States under the brand names Cialis and Adcirca. Tadalafil is prescribed to help men with impotence or erectile dysfunction. The medication, categorized as a phosphodiesterase 5 or PDE5, helps a man achieve an erection upon stimulation and sustain the erection during sex. The Mayo Clinic states that Cialis may also be used in women and men to treat pulmonary arterial hypertension. Cialis has no reports of common side effects that are serious.
Dizziness
Cialis may induce dizziness when a man begins treatment with the medicine. He may feel unsteady and lack his normal sense of balance. This uncomfortable sensation of whirling also may induce nausea or cause him to fall down. While the dizziness itself is not a serious side effect, it can cause a more serious problem if a person falls and hurts himself. Dizziness typically stops after a few days of using the medication, Drugs.com states. A person should contact a physician if the dizzy feelings become severe or persist beyond that time.
Flushing
Hot flashes or flushing bring a feeling of sudden warmth to a person's body. A woman who takes Cialis to treat her arterial pulmonary hypertension may feel her skin get hot suddenly, which may be accompanied by sweating. Her skin also may become red. This side effect is temporary in most people, Drugs.com reports.
Stomach Upset
Stomach upset is another unpleasant but common side effect of Cialis use. This side effect makes the person taking it feel nauseous, but the Mayo Clinic reports that it may include pain or discomfort as well as indigestion, heartburn and belching. These side effects also should end in a few days, but they may require medical attention if they are severe or continue past that time.
Pain
Cialis also may induce pain--such as headaches or pain in the muscles or the back--when a person first takes the medicine. Drugs.com reports that these aches usually are mild, and the pain is generally temporary.
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