In a study conducted by the British Medical Journal, 88% of patients who failed to respond to PDE5-Inhibitors (Viagra, Cialis, Levitra) were successful with injection therapy. Additionally 48% of men who failed to respond to PDE5-inhibitors responded when used in conjunction with injection therapy.
The following year he released Graffiti Bridge (the sequel to Purple Rain), which turned out to be a considerable commercial disappointment. In 1991, Prince formed the New Power Generation, the best and most versatile and talented band he has ever assembled.
Prince's next official release was the mild Lovesexy (Number 11, 1988), which yielded only one hit, Alphabet St. (Number Eight, 1988), but did prompt Prince's first U.S. tour in four years, performing on a rotating stage that the singer entered in a pink Cadillac.