Generic ingredients: Hydrochlorothiazide with triamterene.

Dyazide is a diuretic. Diuretics promote the loss of salt and water in the body and increase the diameter of the blood vessels, thereby lowering blood pressure. 

Quick Facts About Dyazide


Used to treat high blood pressure and other conditions requiring elimination of excess fluid.

Dyazide Dosage

Take early in the day. May take with food to avoid stomach irritation. Must take regularly to be effective against high blood pressure, and can take several weeks before full effects are observed. Continue to take even if feeling well.

  • Usual adult dose: 1 or 2 capsules one time per day. Potassium levels should be monitored by your doctor.
  • Usual child dose: not generally prescribed for children.
  • Missed dose: take as soon as possible, unless almost time for next dose. In that case, do not take missed dose; go back to regular schedule. Do not double doses.

Dyazide Side Effects

Overdose symptoms:

fever, flushed face, nausea, production of large amounts of pale urine, vomiting, weakness, weariness. If you suspect an overdose, immediately seek medical attention.

More common side effects: abdominal pain, anemia, blurred vision, breathing difficulty, change in potassium level, constipation, diabetes, diarrhea, dizziness, dizziness when standing up, dry mouth, fatigue, fluid in the lungs, headache, hives, impotence, irregular heartbeat, kidney failure, kidney stones, muscle cramps, nausea, rash, sensitivity to light, strong allergic reaction, tingling or pins and needles, vertigo, vision changes, vomiting, weakness, worsening of lupus, yellow eyes and skin.

No known less common or rare Dyazide side effects.


Inform your doctor before combining Dyazide with:

ACE inhibitors such as Capoten and Vasotec; adrenocorticotropic hormone (acth); amphotericin B (Fungizone); blood thinners such as Coumadin; corticosteroids such as Deltasone; diabetes medications such as Micronase; gout medications such as Zyloprim; laxatives; lithium (Lithonate); low-salt milk; Methenamine (Urised); nonsteroidal anti-inflammatory drugs such as Voltaren and Dolobid; norepinephrine (Levophed); other drugs that minimize potassium loss or contain potassium; other high blood pressure medications such as Minipress and Vasotec; salt substitutes containing potassium; sodium polystyrene sulfonate (Kayexalate).

No known food/other substance interactions. 

Special Cautions

If pregnant or planning to become pregnant, inform your doctor immediately. Appears in breast milk, could affect a nursing infant.

No special precautions apply to seniors.

Not generally prescribed for children.

  • Do not use potassium<ontaining salt substitutes. Only take potassium supplements under the direction of your doctor. Doctor should monitor potassium level on an ongoing basis.
  • If you are: unable to urinate, have serious kidney disease, high potassium levels in the blood, or if you are taking other medications to prevent potassium loss, you should not take Dyazide.
  • If sensitive to or allergic to ingredients in this medication or similar medications, or sulfa drugs, should not take.
  • Use with caution if you have: liver disease, diabetes, cirrhosis of the liver, heart failure, or kidney stones.
  • Kidney function should be monitored regularly if you have kidney disease.
  • Monitor for dehydration when exercising or in hot weather if you have a salt deficiency.
  • Not recommended to be in sunlight for prolonged periods.


HealthSurvey.org provides accurate and independent information prescription pills, over-the-counter medicines and natural products. This material is provided for educational purposes only and is not intended for medical advice, diagnosis or treatment. If you have questions about  dosage, or Dyazide side effects, please contact your healthcare provider.