Volume depletion

Prerenal azotemia

Potassium depletion

Hyponatremia (thiazides)

Metabolic alkalosis

Hypercholesterolemia

Hyperglycemia (thiazides)

Hyperkalemia (K-sparing)

Hypomagnesemia

Hyperuricemia

Hypercalcemia (thiazides)

GI complaints

Rash (thiazides)

Interstitial nephritis (thiazides, furosemide)

Pancreatitis (thiazides)

Loss of hearing (loop diuretics)

Anemia, leukopenia, thrombocytopenia (thiazides)