September 25, 2016
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Methyclothiazide (methyclothiazide (methyclothiazide (methyclothiazide tablet 5 mg) tablet 5 mg) tablet 5 mg) is indicated in the management of hypertension either as the sole therapeutic agent or to enhance the effect of other antihypertensive drugs in the more severe forms of hypertension.

Methyclothiazide (methyclothiazide (methyclothiazide (methyclothiazide tablet 5 mg) tablet 5 mg) tablet 5 mg) tablets are indicated as adjunctive therapy in edema associated with congestive heart failure, hepatic cirrhosis, and corticosteroid and estrogen therapy.

Methyclothiazide (methyclothiazide (methyclothiazide (methyclothiazide tablet 5 mg) tablet 5 mg) tablet 5 mg) tablets have also been found useful in edema due to various forms of renal dysfunction such as the nephritic syndrome, acute glomerulonephritis, and chronic renal failure.

Usage in Pregnancy

The routine use of diuretics in an otherwise healthy pregnant woman is inappropriate and exposes mother and fetus to unnecessary hazard. Diuretics do not prevent development of toxemia of pregnancy, and there is no satisfactory evidence that they are useful in the treatment of developed toxemia.

Edema during pregnancy may arise from pathological causes or from the physiological and mechanical consequences of pregnancy. Thiazides are indicated in pregnancy when edema is due to pathological causes, just as they are in the absence of pregnancy (see PRECAUTIONS: Pregnancy). Dependent edema in pregnancy, resulting from restriction of venous return by the expanded uterus, is properly treated through elevation of the lower extremities and use of support hose; use of diuretics to lower intravascular volume in this case is illogical and unnecessary. There is hypervolemia during normal pregnancy that is harmful to neither the fetus nor the mother (in the absence of cardiovascular disease), but that is associated with edema, including generalized edema, in the majority of pregnant women. If this edema produces discomfort, increased recumbency will often provide relief. In rare instances, this edema may cause extreme discomfort that is not relieved by rest. In these cases, a short course of diuretics may provide relief and may be appropriate.


Methyclothiazide (methyclothiazide (methyclothiazide (methyclothiazide tablet 5 mg) tablet 5 mg) tablet 5 mg) is administered orally. Therapy should be individualized according to patient response. This therapy should be titrated to gain maximal therapeutic response as well as the minimal dose possible to maintain that therapeutic response.

For edematous conditions

The usual adult dose ranges from 2.5 mg to 10 mg once daily. Maximum effective single dose is 10 mg; larger single doses do not accomplish greater diuresis, and are not recommended.

For the treatment of hypertension

The usual adult dose ranges from 2.5 to 5 mg once daily.

If control of blood pressure is not satisfactory after 8 to 12 weeks of therapy with 5 mg once daily, another antihypertensive drug should be added. Increasing the dosage of methyclothiazide (methyclothiazide (methyclothiazide (methyclothiazide tablet 5 mg) tablet 5 mg) tablet 5 mg) will usually not result in further lowering of blood pressure.

Methyclothiazide (methyclothiazide (methyclothiazide (methyclothiazide tablet 5 mg) tablet 5 mg) tablet 5 mg) may be either employed alone for mild to moderate hypertension or concurrently with other antihypertensive drugs in the management of more severe forms of hypertension. Combined therapy may provide adequate control of hypertension with lower dosage of the component drugs and fewer or less severe side effects.

When other antihypertensive agents are to be added to the regimen, this should be accomplished gradually. Ganglionic blocking agents should be given at only half the usual dose since their effect is potentiated by pretreatment with methyclothiazide tablets.


Methyclothiazide Tablets, USP are available containing 5 mg of methyclothiazide (methyclothiazide (methyclothiazide (methyclothiazide tablet 5 mg) tablet 5 mg) tablet 5 mg) , USP. The tablets are blue, round, scored tablets. They are debossed with M29 on the scored side. They are available as follows:

NDC 0378-0160-01
bottles of 100 tablets



Dispense in a tight, light-resistant container as defined in the USP using a child-resistant closure.

Mylan Pharmaceuticals Inc., Morgantown, WV 26505, Revised October 2002.

This monograph has been modified to include the generic and brand name in many instances.

Last reviewed on RxList: 6/4/2009

How Supplied

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