Spironolactone is contraindicated with which of the following drugs:
Spironolactone is a K+ sparing diuretic. It should be used cautiously if the patient is receiving K+ salts or drugs increasing serum K+ levels.

ACE inhibitors can also cause hyperkalemia as an adverse effect. If these are combined with K+ sparing diuretics, cardiac arrhythmia due to high serum K+ levels may develop
Enalapril.
Atenolol.
Verapamil.
Chlorthiazide.