Uncommon (affects 1 to 10 users in 1,000) Sensitivity of the skin to sunlight High or low blood pressure Back or muscle pain Effects on vision Bloodshot or watery eyes Rash Sleepiness Effect in results of blood tests to check liver function Increase in blood of a muscle enzyme (creatine phosphokinase) Breathlessness Fast heart beat or pounding heart Nose bleeds Facial swelling