Hydrochlorothiazide
high blood pressure
"I have been taking 50 mg of Metoprolol Succ for 5 years and my blood pressure recently became very variable.  At times it was very well controlled but then it would spike.My cardiologist added 25 mg hydrochlorothiazide 25 mg daily.  I'd taken  it years ago and it caused my sodium to go quite low-122.  The doctor that prescribed stopped This doctor convinced me to try it again and she would check my sodium and potassium.  I took it for three days and developed several side effects including dizziness, vision changes, mild chest pain, severe constipation and both upper and lower abdominal pains.  Doctor said  stop it. i checked my diary and sure enough I'd been having severe constipation and abdominal pain last time I took it."