Calcium: Increased; Potassium: Decreased; Sodium: Increased

Are you sure? You are right that thiazide diuretics increase calcium levels, while decreasing potassium levels. Remember that thiazide diuretics work on the distal convoluted tubule, which results in excretion of sodium in the urine, thus leading to decreased levels in the plasma as well.

Further Development

Mr. Hill is treated accordingly for anaphylactic shock. He recovers well and is advised to return to his General Practitioner so that his anti-hypertensive medication can be adjusted accordingly.

Which drug should Mr. Hill be prescribed?