Olmesartan medoxomil: Dizziness, vertigo, syncope, palpitations, hypotension, orthostatic hypotension, rash, eczema, weakness, decreased/increased blood K. Thrombocytopenia, headache, angina pectoris, bronchitis, cough, pharyngitis, rhinitis, abdominal pain, diarrhea, vomiting, pruritus, exanthema, dyspepsia, gastroenteritis, nausea, arthritis, back & skeletal pain, haematuria, UTI, chest pain, fatigue, lethargy, malaise, flu-like symptoms, peripheral & angioneurotic oedema, allergic dermatitis, face oedema & urticaria, anaphylactic reaction, muscle cramp, myalgia, acute renal failure & insufficiency, asthenia, pain, increased creatinine phosphokinase, hypertriglyceridaemia, hyperuricaemia, increased blood creatinine & urea, increased hepatic enzymes, hyperkalaemia, liver enzyme elevations. Hydrochlorothiazide: Anorexia, loss of appetite, gastric irritation, diarrhea, constipation, sialadenitis, pancreatitis, jaundice (intrahepatic cholestatic jaundice), xanthopsia, transient blurred vision, leukopenia, neutropenia/agranulocytosis, thrombocytopenia, aplastic anemia, haemolytic anaemia, bone marrow depression, photosensitivity reactions, rash, cutaneous SLE-like reactions, cutaneous lupus erythematosus reactivation, urticaria, necrotising angitis (vasculitis, cutaneous vasculitis), anaphylactic reactions, toxic epidermal necrolysis, fever, resp distress (including pneumonitis & pulmonary oedema), renal dysfunction, interstitial nephritis, muscle spasm, weakness, restlessness, light-headedness, vertigo, paraestheasiae, postural hypotension, cardiac arrhtyhmias, sleep disturbances, depression.