Complex sentence: About 9% of patients treated with drugs discontinued treatment due to adverse effects and that treating hypertension aiming for blood pressure targets lower than 140/90 mmHg did not prolong survival or reduce stroke, heart attack, heart failure or kidney failure.
Split into simpler sentences: About 9% of patients treated with drugs discontinued treatment due to adverse effects. It did not prolong survival or reduce stroke, heart attack, heart failure or kidney failure.