You should not use this medicine if have kidney disease, urination problems, high levels of potassium in your blood, or if you are taking other diuretics similar to triamterene.
This medicine can raise your blood potassium to dangerous levels, especially if you have kidney disease, diabetes, severe illness, or if you are an older adult. Call your doctor right away if you have signs of high potassium: nausea, tingly feeling, feeling weak or tired, slow heartbeats, or loss of movement.
Before taking this medicine
You should not use  hydrochlorothiazide and triamterene if you are allergic to hydrochlorothiazide or triamterene, or if:
you have kidney disease or are unable to urinate;
you have high potassium levels (hyperkalemia);
you are taking diuretics similar to triamterene, such as amiloride or spironolactone; or
you are taking potassium supplements (unless your doctor tells you to).
Diuretics such as triamterene can raise your blood potassium to dangerous levels. This is more likely to occur if you have kidney disease, diabetes, severe illness, or if you are an older adult. Ask your doctor about your individual risk.
Tell your doctor if you have ever had:
diabetes;
cirrhosis or other liver disease;
heart disease, heart rhythm disorder;
gout;
cataracts or glaucoma;
an allergy to sulfa drugs or penicillin;
kidney stones; o
if you are on a low-salt diet.
It is not known whether this medicine will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant.
You should not breastfeed while using this medicine.
This medicine is not approved for use by anyone younger than 18 years old.
