Bret Michaels. Bret Michael Sychak (born March 15, 1963), professionally known as Bret Michaels, is an American singer-songwriter and musician. He gained fame as the lead singer of the glam metal band Poison who have sold over 50 million records worldwide and 15 million records in the United States alone.
Sildenafil Sandoz PHT 20 is used to treat pulmonary arterial hypertension (high blood pressure in the blood vessels in the lungs). Sildenafil Sandoz PHT 20 brings down the blood pressure by relaxing these vessels.
Sildenafil citrate, a specific phosphodiesterase-5 inhibitor, is increasingly used for pulmonary hypertension in pregnancy. Sildenafil is also emerging as a potential candidate for the treatment of intra-uterine growth retardation and for premature labor. Its effects in the feto-placental circulation are not known.