Using chlorthalidone with other drugs that make you light-headed can worsen this effect. Ask your doctor before using opioid medication, a sleeping pill, a muscle relaxer, or medicine for anxiety or seizures.
Tell your doctor about all your other medicines, especially:
other blood pressure medications;
lithium;
digoxin, digitalis;
insulin or oral diabetes medicine; or
steroid medicine.
This list is not complete. Other drugs may affect chlorthalidone, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.
 Chlorthalidone drug interactions (more detail)
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