What is Methyclothiazide?

Methyclothiazide is used alone or together with other medicines to treat high blood pressure (hypertension). High blood pressure adds to the workload of the heart and arteries. If it continues for a long time, the heart and arteries may not function properly. This can damage the blood vessels of the brain, heart, and kidneys, resulting in a stroke, heart failure, or kidney failure. High blood pressure may also increase the risk of heart attacks. These problems may be less likely to occur if blood pressure is controlled .

Methyclothiazide is used to treat fluid retention (edema) that is caused by congestive heart failure, severe liver disease (cirrhosis), kidney disease, or treatment with a steroid or hormone medicine .

Methyclothiazide is a thiazide diuretic (water pill). It reduces the amount of water in the body by increasing the flow of urine, which helps to lower blood pressure .

This medicine is available only with your doctor's prescription .

In addition to the use of this medicine, treatment for your high blood pressure may include weight control and changes in the types of foods you eat, especially foods high in sodium or potassium. Your doctor will tell you which of these are most important for you. You should check with your doctor before changing your diet .

Many patients who have high blood pressure will not notice any signs of the problem. In fact, many may feel normal. It is very important that you take your medicine exactly as directed and that you keep your appointments with your doctor even if you feel well .

Remember that this medicine will not cure your high blood pressure, but it does help control it. You must continue to receive it as directed if you expect to lower your blood pressure and keep it down. You may have to take high blood pressure medicine for the rest of your life. If high blood pressure is not treated, it can cause serious problems such as heart failure, blood vessel disease, stroke, or kidney disease .

The dose of this medicine will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.

The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.

• For oral dosage forms (tablets):
  • For fluid retention (edema):
    • Adults—The usual dose is 2.5 to 10 milligrams (mg) once a day. Your doctor may adjust your dose if needed.
    • Children—Use and dose must be determined by your doctor .
  • For high blood pressure:
    • Adults—The usual dose is 2.5 to 5 milligrams (mg) once a day. Your doctor may adjust your dose if needed.
    • Children—Use and dose must be determined by your doctor .

If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.

Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.

Keep out of the reach of children.

Do not keep outdated medicine or medicine no longer needed.

Ask your healthcare professional how you should dispose of any medicine you do not use.

In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For this medicine, the following should be considered:

Tell your doctor if you have ever had any unusual or allergic reaction to this medicine or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.

Appropriate studies have not been performed on the relationship of age to the effects of methyclothiazide in the pediatric population. Safety and efficacy have not been established .

No information is available on the relationship of age to the effects of methyclothiazide in geriatric patients. However, elderly patients are more likely to have age-related kidney disease, which may require an adjustment in the dose for patients receiving methyclothiazide .

There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.

Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking this medicine, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Using this medicine with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

• Aceclofenac
• Acemetacin
• Acetyldigoxin
• Amtolmetin Guacil
• Arsenic Trioxide
• Aspirin
• Bepridil
• Bromfenac
• Bufexamac
• Celecoxib
• Choline Salicylate
• Clonixin
• Deslanoside
• Desmopressin
• Dexibuprofen
• Dexketoprofen
• Diclofenac
• Diflunisal
• Digitalis
• Digitoxin
• Digoxin
• Dipyrone
• Dofetilide
• Droxicam
• Etodolac
• Etofenamate
• Etoricoxib
• Felbinac
• Fenoprofen
• Fepradinol
• Feprazone
• Floctafenine
• Flufenamic Acid
• Flurbiprofen
• Ibuprofen
• Indomethacin
• Ketanserin
• Ketoprofen
• Ketorolac
• Lithium
• Lornoxicam
• Loxoprofen
• Lumiracoxib
• Meclofenamate
• Mefenamic Acid
• Meloxicam
• Metildigoxin
• Morniflumate
• Nabumetone
• Naproxen
• Nepafenac
• Niflumic Acid
• Nimesulide
• Nimesulide Beta Cyclodextrin
• Oxaprozin
• Oxyphenbutazone
• Parecoxib
• Phenylbutazone
• Piketoprofen
• Piroxicam
• Proglumetacin
• Propyphenazone
• Proquazone
• Rofecoxib
• Salicylic Acid
• Salsalate
• Sodium Salicylate
• Sulindac
• Tenoxicam
• Tiaprofenic Acid
• Tolfenamic Acid
• Tolmetin
• Valdecoxib

Using this medicine with any of the following medicines may cause an increased risk of certain side effects, but using both drugs may be the best treatment for you. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

• Aminolevulinic Acid
• Ginkgo
• Gossypol
• Licorice

Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. Discuss with your healthcare professional the use of your medicine with food, alcohol, or tobacco.

The presence of other medical problems may affect the use of this medicine. Make sure you tell your doctor if you have any other medical problems, especially:

• Anuria (not able to form urine)—Should not be used in patients with this condition .

• Asthma or
• Diabetes or
• Gout or
• Hypercalcemia (high calcium in the blood) or
• Hypercholesterolemia (high cholesterol in the blood) or
• Hyperuricemia (high uric acid in the blood) or
• Hypochloremia (low chloride in the blood) or
• Hypokalemia (low potassium in the blood) or
• Hyponatremia (low sodium in the blood) or
• Hypophosphatemia (low phosphorus in the blood) or
• Systemic lupus erythematosus—Use with caution. This medicine may make these conditions worse .

• Kidney disease or
• Liver disease—Use with caution. The effects of the medicine may be increased because of slower removal of the medicine from the body .

It is very important that your doctor check your progress at regular visits to make sure this medicine is working properly. Blood tests may be needed to check for unwanted effects .

Check with your doctor right away if you have any of the following symptoms while taking this medicine: convulsions or seizures; decreased urine; drowsiness; dry mouth; excessive thirst; muscle pains or cramps; nausea or vomiting; increased heart rate or pulse; or unusual tiredness or weakness. These may be symptoms of a condition called hypokalemia or potassium loss .

This medicine may cause some people to become dizzy. Do not drive, use machines, or do anything else that could be dangerous if you are dizzy.

Drinking alcoholic beverages may also make the dizziness worse. While you are taking this medicine, be careful to limit the amount of alcohol you drink .

Before you have any medical tests, tell the medical doctor in charge that you are taking this medicine. The results of some tests (e.g., tests for parathyroid function) may be affected by this medicine .

Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements .