A rare but possible serious side effect of using Ristenza® is Serotonin Syndrome. This is a constellation of symptoms, including fever, high blood pressure and an irregular heartbeat. This can be life threatening.
Men who experience any of the following symptoms should discontinue the use of Ristenza® and advise their physician immediately: fast heartbeat, redness, swelling and/or itchiness of the face, numbness or tingling of the hands and/or feet, difficulty breathing, changes in urination or seizures.
Most men can safely use Ristenza®. However, there are some men who should not use Ristenza®.
Men who use Ristenza® should not consume more than one alcoholic beverage within 6 hours of taking Ristenza®.
Men who are taking any of the following medications should consult a healthcare provider before using Ristenza®:
Carbamazepine, quinidine, cimetidine, selective serotonin reuptake inhibitors, such as fluoxetine and paroxetine, tricyclic antidepressants, such as amitriptyline and nortriptyline, MAO inhibitors, venlafaxine, digoxin, warfarin, narcotics, cocaine, tranquilizers, sedatives, opioids, CNS depressants, herbal supplements, such as St. John’s Wart, and nitrates.
As Ristenza® may cause drowsiness, this medication needs to be used with caution if you are intending to drive, operate machinery or perform other hazardous activities.