Dyazide (Triamterene/HCTZ)

(℞) Prescription Required

Top Brand Choice
Top Generic Choice

Triamterene/HCTZ 50mg/25mg

Product of Canada
Manufactured by: Novo Pharm Inc
*Product image for reference use only.
Select Quantity
Triamterene/HCTZ 50mg/25mg
Product of Canada
Manufactured by Novo Pharm Inc
Select your dosage

Dyazide (Triamterine/HCTZ) Dosage and Side Effects

DYAZIDE is a thiazide diuretic (water pill) that helps prevent your body from absorbing too much salt, which can cause fluid retention.

DYAZIDE is used to treat fluid retention (edema) and high blood pressure (hypertension).

Warnings and Precautions

You should not use this medication if you are allergic to hydrochlorothiazide or triamterene, or if you have kidney disease, urination problems, high levels of potassium in your blood, or if you are taking other diuretics similar to triamterene. Do not use potassium supplements unless your doctor has told you to.

Before using this medication, tell your doctor if you have heart or liver disease, glaucoma, diabetes, a breathing disorder, gout, lupus, kidney stones, a pancreas disorder, or an allergy to sulfa drugs or penicillin.

Drinking alcohol can further lower your blood pressure and may increase certain side effects of DYAZIDE.

Avoid a diet high in salt. Too much salt will cause your body to retain water and can make this medication less effective.

Do not use potassium supplements, salt substitutes, or low-sodium milk while you are taking DYAZIDE, unless your doctor has told you to.

Avoid becoming overheated or dehydrated during exercise and in hot weather. Follow your doctor's instructions about the type and amount of liquids you should drink. In some cases, drinking too much liquid can be as unsafe as not drinking enough.

If you are being treated for high blood pressure, keep using this medication even if you feel fine. High blood pressure often has no symptoms.

You should not use this medication if you are allergic to hydrochlorothiazide (HCTZ, HydroDiuril, Lotensin HCT, Prinzide, Zestoretic, Ziac, and others) or triamterene (Dyrenium), or if you have:

  • kidney disease or are unable to urinate;
  • high potassium levels (hyperkalemia);
  • if you are taking diuretics similar to triamterene, such as amiloride (Midamor, Moduretic), spironolactone (Aldactone, Aldactazide); or
  • if you are taking potassium supplements (unless your doctor tells you to).

To make sure you can safely take DYAZIDE, tell your doctor if you have any of these other conditions:

  • diabetes;
  • heart disease;
  • cirrhosis or other liver disease;
  • glaucoma;
  • a breathing disorder;
  • gout;
  • lupus;
  • a history of kidney stones;
  • a pancreas disorder; or
  • an allergy to sulfa drugs or penicillin.
  •  It is not known whether DYAZIDE will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant while using this medication.

DYAZIDE can pass into breast milk and may harm a nursing baby. You should not breast-feed while taking DYAZIDE.

Side Effects

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Stop using DYAZIDE and call your doctor at once if you have a serious side effect such as:

  • eye pain, vision problems;
  • slow, fast, or uneven heartbeat;
  • feeling like you might pass out;
  • swelling or rapid weight gain;
  • urinating less than usual or not at all;
  • headache, trouble concentrating, memory problems, weakness, loss of appetite, feeling unsteady, hallucinations, fainting, seizure, shallow breathing or breathing that stops;
  • low potassium (confusion, uneven heart rate, extreme thirst, increased urination, leg discomfort, muscle weakness or limp feeling);
  • high potassium (irregular heart rate, weak pulse, muscle weakness, tingly feeling);
  • severe pain in your upper stomach spreading to your back, nausea and vomiting, fast heart rate;
  • easy bruising, unusual bleeding (nose, mouth, vagina, or rectum), purple or red pinpoint spots under your skin;
  • patchy skin color, red spots, or a butterfly-shaped skin rash over your cheeks and nose (worsens in sunlight);
  • fever, sore throat, and headache with a severe blistering, peeling, and red skin rash; or
  • jaundice (yellowing of the skin or eyes).

Less serious side effects may include:

  • mild nausea, diarrhea, constipation;
  • dizziness, headache;
  • blurred vision;
  • dry mouth;
  • skin rash.

Interactions with this medication

Drinking alcohol can further lower your blood pressure and may increase certain side effects of DYAZIDE.

Avoid a diet high in salt. Too much salt will cause your body to retain water and can make this medication less effective.

Do not use potassium supplements, salt substitutes, or low-sodium milk while you are taking DYAZIDE, unless your doctor has told you to.

DYAZIDE may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be alert.

Avoid becoming overheated or dehydrated during exercise and in hot weather. Follow your doctor's instructions about the type and amount of liquids you should drink. In some cases, drinking too much liquid can be as unsafe as not drinking enough.

Before using DYAZIDE, tell your doctor if you regularly use other medicines that make you sleepy (such as cold or allergy medicine, sedatives, narcotic pain medicine, sleeping pills, muscle relaxers, and medicine for seizures, depression, or anxiety). They can add to sleepiness caused by DYAZIDE.

Tell your doctor about all other medicines you use, especially:

  • lithium (Eskalith, LithoBid);
  • amphotericin B (Amphotec, AmBisome, Abelcet);
  • methenamine (Hiprex, Mandelamine, Urex);
  • gout medication such as allopurinol (Zyloprim), colchicine (Colcrys), or probenecid (Benemid);
  • steroid medication (prednisone and others);
  • a blood thinner such as warfarin (Coumadin, Jantoven);
  • insulin or oral diabetes medication;
  • laxatives;
  • an ACE inhibitor such as benazepril (Lotensin), enalapril (Vasotec), lisinopril (Prinivil, Zestril), quinapril (Accupril), ramipril (Altace), and others; or
  • indomethacin (Indocin) or other NSAIDs (non-steroidal anti-inflammatory drugs) such as aspirin, ibuprofen (Advil, Motrin), naproxen (Aleve, Naprosyn, Naprelan, Treximet), celecoxib (Celebrex), diclofenac (Arthrotec, Cambia, Cataflam, Voltaren, Flector Patch, Pennsaid, Solareze), indomethacin (Indocin), meloxicam (Mobic), and others.

This list is not complete and other drugs may interact with DYAZIDE. Tell your doctor about all medications you use. This includes prescription, over-the-counter, vitamin, and herbal products. Do not start a new medication without telling your doctor.

Proper Use of this medication

Take exactly as prescribed by your doctor. Do not take in larger or smaller amounts or for longer than recommended. Follow the directions on your prescription label.

Your doctor may occasionally change your dose to make sure you get the best results.

You will need regular medical tests to be sure this medication is not causing harmful effects. Visit your doctor regularly.

If you need surgery or medical tests, tell the doctor ahead of time that you are taking medication that contains hydrochlorothiazide. You may need to stop using the medicine for a short time.

Keep using this medicine as directed, even if you feel well. High blood pressure often has no symptoms. You may need to use blood pressure medication for the rest of your life.

Store at room temperature away from moisture, heat, and light.

Seek emergency medical attention or call the Poison Help line.

Overdose symptoms may include increased urination, nausea, vomiting, weakness, fever, warmth or flushing in your face, or muscle spasms.

Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.

Other related products

The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

Back to top