Hctz

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Generic Name: Hctz Brand Name(s): Generics only. No brands available.

Uses

What is HCTZ (hydrochlorothiazide) used for?

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

HCTZ treats fluid retention (edema) in people with congestive heart failure, cirrhosis of the liver, or kidney disorders, or edema caused by taking steroids or estrogen. HCTZ is also used to treat high blood pressure (hypertension).

HCTZ may also be used for purposes not listed in HCTZ guide.

How should I take HCTZ (hydrochlorothiazide)?

Take HCTZ 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.

Your blood pressure will need to be checked often. Visit your doctor regularly.

Your blood and urine may both be tested if you have been vomiting or are dehydrated.

HCTZ can interfere with the results of a thyroid test. Tell any doctor who treats you that you are using a thiazide diuretic.

If you are being treated for high blood pressure, keep using HCTZ even if you feel well. High blood pressure often has no symptoms. You may need to use blood pressure HCTZ for the rest of your life.

How do I store HCTZ (hydrochlorothiazide)?

HCTZ is best stored at room temperature away from direct light and moisture. To prevent drug damage, you should not store HCTZ in the bathroom or the freezer. There may be different brands of HCTZ that may have different storage needs. It is important to always check the product package for instructions on storage, or ask your pharmacist. For safety, you should keep all medicines away from children and pets.

You should not flush HCTZ down the toilet or pour them into a drain unless instructed to do so. It is important to properly discard this product when it is expired or no longer needed. Consult your pharmacist for more details about how to safely discard your product.

Precautions & warnings

What should I know before using HCTZ (hydrochlorothiazide)?

Before using this drug, tell your doctor if:

  • You are pregnant or breastfeeding. This is because, while you are expecting or feeding a baby, you should only take medicines on the recommendation of a doctor.
  • You are taking any other medicines. This includes any medicines you are taking which are available to buy without a prescription, such as herbal and complementary medicines.
  • You have allergy with any of active or inactive ingredients of HCTZ or other medications.
  • You have any other illnesses, disorders, or medical conditions.

You should not use HCTZ if you are unable to urinate.

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

  • Kidney disease
  • Liver disease
  • Glaucoma
  • Asthma or allergies
  • Gout
  • Diabetes
  • An allergy to sulfa drugs

Is it safe during pregnancy or breastfeeding?

There are no adequate studies in women for determining risk when using HCTZ during pregnancy or while breastfeeding. Please always consult with your doctor to weigh the potential benefits and risks before taking HCTZ. HCTZ is pregnancy risk category B, according to the US Food and Drug Administration (FDA).

FDA pregnancy risk category reference below:

  • A=No risk
  • B=No risk in some studies
  • C=There may be some risk
  • D=Positive evidence of risk
  • X=Contraindicated
  • N=Unknown

Side effects

What side effects can occur from HCTZ (hydrochlorothiazide)?

Get emergency medical help if you have any of these signs of an allergic reaction to HCTZ: hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Stop using HCTZ and call your doctor at once if you have a serious side effect such as:

  • Eye pain, vision problems
  • Dry mouth, thirst, nausea, vomiting
  • Feeling weak, drowsy, restless, or light-headed
  • Fast or uneven heartbeat
  • Muscle pain or weakness
  • Numbness or tingly feeling
  • A red, blistering, peeling skin rash
  • Nausea, stomach pain, low fever, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes)

Less serious side effects may include:

  • Diarrhea
  • Mild stomach pain
  • Constipation
  • Blurred vision

Not everyone experiences these side effects. There may be some side effects not listed above. If you have any concerns about a side-effect, please consult your doctor or pharmacist.

Interactions

What drugs may interact with HCTZ (hydrochlorothiazide)?

HCTZ may interact with other drugs that you are currently taking, which can change how your drug works or increase your risk for serious side effects. To avoid any potential drug interactions, you should keep a list of all the drugs you are using (including prescription drugs, nonprescription drugs, and herbal products) and share it with your doctor and pharmacist. For your safety, do not start, stop, or change the dosage of any drugs without your doctor’s approval.

Products that may interact with this drug are:

  • Lithium (Eskalith, Lithobid)
  • Digoxin (Lanoxin)
  • Cholestyramine (Prevalite, Questran) or colestipol (Colestid)
  • Steroids (prednisone and others)
  • Other blood pressure medications
  • 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
  • Insulin or oral diabetes HCTZ (hydrochlorothiazide)

Does food or alcohol interact with HCTZ (hydrochlorothiazide)?

HCTZ may interact with food or alcohol by altering the way the drug works or increase the risk for serious side effects. Please discuss with your doctor or pharmacist any potential food or alcohol interactions before using this drug.

What health conditions may interact with HCTZ (hydrochlorothiazide)?

HCTZ may interact with your health condition. This interaction may worsen your health condition or alter the way the drug works. It is important to always let your doctor and pharmacist know all the health conditions you currently have.

Dosage

The information provided is not a substitute for any medical advice. You should ALWAYS consult with your doctor or pharmacist before using HCTZ (hydrochlorothiazide).

What is the dose of HCTZ (hydrochlorothiazide) for an adult?

Usual Adult Dose for Edema:

25 to 100 mg orally as a single or divided dose.

Usual Adult Dose for Hypertension:

Initial dose: 25 mg orally once a day.

Maintenance dose: May increase to 50 mg orally as a single or 2 divided doses.

Usual Adult Dose for Nephrocalcinosis:

Initial: 25 mg orally once a day

Maintenance dose: May increase to 50 mg twice a day

Usual Adult Dose for Osteoporosis:

Initial: 25 mg orally once a day

Maintenance dose: May increase to 50 mg per day

Usual Adult Dose for Diabetes Insipidus:

Initial: 50 mg orally once a day

Maintenance dose: May increase to 100 mg per day

What is the dose of HCTZ (hydrochlorothiazide) for a child?

Usual Pediatric Dose for Edema

Less than 6 months: Up to 3 mg/kg/day (up to 1.5 mg/pound) orally in 2 divided doses.

Less than 2 years: 1 to 2 mg/kg/day (0.5 to 1 mg/pound) orally daily as a single dose or in 2 divided doses. Maximum dose 37.5 mg per day.

2 to 12 years: 1 to 2 mg/kg/day (0.5 to 1 mg/pound) orally daily as a single dose or in 2 divided doses. Maximum dose 100 mg per day.

Usual Pediatric Dose for Hypertension

Less than 6 months: Up to 3 mg/kg/day (up to 1.5 mg/pound) orally in 2 divided doses.

Less than 2 years: 1 to 2 mg/kg/day (0.5 to 1 mg/pound) orally daily as a single dose or in 2 divided doses. Maximum dose 37.5 mg per day.

2 to 12 years: 1 to 2 mg/kg/day (0.5 to 1 mg/pound) orally daily as a single dose or in 2 divided doses. Maximum dose 100 mg per day.

How is HCTZ (hydrochlorothiazide) available?

HCTZ is available in the following dosage forms and strengths:

  • Tablet

What should I do in case of an emergency or overdose?

In case of an emergency or an overdose, call your local emergency services or go to your nearest emergency room.

What should I do if I miss a dose?

If you miss a dose of HCTZ, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and take your regular dose as scheduled. Do not take a double dose.

Hello Health Group does not provide medical advice, diagnosis or treatment.

msBahasa Malaysia

Review Date: September 6, 2017 | Last Modified: September 7, 2017

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