Abdominal pain, diarrhea, flatulence, tiredness, viral infection, pharyngitis, sinusitis, arthralgia, back pain & coughing. Raised red rash sometimes w/ target-shaped lesions, dizziness, depression, tingling sensation, constipation, & unusual tiredness or weakness. When co-administered w/ statin: Headache, myalgia, upper resp tract infection, changes in certain laboratory tests.