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Indapamide

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Overview

What is Indapamide?

Indapamide is an oral antihypertensive/diuretic. Its molecule contains both a polar sulfamoyl chlorobenzamide moiety and a lipid-soluble methylindoline moiety. It differs chemically from the thiazides in that it does not possess the thiazide ring system and contains only one sulfonamide group. The chemical name of indapamide is 4-Chloro- -(2-methyl-1-indolinyl)-3-Sulfamoylbenzamide, and its molecular weight is 365.84. The compound is a weak acid, pK =8.8, and is soluble in aqueous solutions of strong bases. It is a white to yellow-white crystalline (tetragonal) powder, and has the following structural formula:

Each tablet, for oral administration, contains 1.25 mg or 2.5 mg of indapamide. In addition, each tablet contains the following inactive ingredients: corn starch, hypromellose, lactose monohydrate, magnesium stearate, maltodextrin, microcrystalline cellulose, polydextrose, polyethylene glycol, talc, titanium dioxide, triacetin. The 1.25 mg tablet also contains FD&C yellow #6 aluminum lake (sunset yellow lake).



What does Indapamide look like?



What are the available doses of Indapamide?

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What should I talk to my health care provider before I take Indapamide?

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How should I use Indapamide?

Indapamide tablets are indicated for the treatment of hypertension, alone or in combination with other antihypertensive drugs.

Indapamide tablets are also indicated for the treatment of salt and fluid retention associated with congestive heart failure.

Usage in Pregnancy:

Edema during pregnancy may arise from pathological causes or from the physiologic and mechanical consequences of pregnancy. Indapamide is indicated in pregnancy when edema is due to pathologic causes, just as it is in the absence of pregnancy (however, see ). 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 which is not harmful to either the fetus or the mother (in the absence of cardiovascular disease), but which 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 which is not relieved by rest. In these cases, a short course of diuretics may provide relief and may be appropriate.

Hypertension:

Edema Of Congestive Heart Failure:

If the antihypertensive response to indapamide is insufficient, indapamide may be combined with other antihypertensive drugs, with careful monitoring of blood pressure. It is recommended that the usual dose of other agents be reduced by 50% during initial combination therapy. As the blood pressure response becomes evident, further dosage adjustments may be necessary.

In general, doses of 5 mg and larger have not appeared to provide additional effects on blood pressure or heart failure, but are associated with a greater degree of hypokalemia. There is minimal clinical trial experience in patients with doses greater than 5 mg once a day.


What interacts with Indapamide?

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What are the warnings of Indapamide?

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What are the precautions of Indapamide?

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What are the side effects of Indapamide?

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What should I look out for while using Indapamide?

Anuria. Known hypersensitivity to indapamide or to other sulfonamide-derived drugs.

Severe cases of hyponatremia, accompanied by hypokalemia, have been reported with recommended doses of indapamide. This occurred primarily in elderly females. (See PRECAUTIONS, ) This appears to be dose-related. Also, a large case-controlled pharmacoepidemiology study indicates that there is an increased risk of hyponatremia with indapamide 2.5 mg and 5 mg doses. Hyponatremia considered possibly clinically significant (
Hypokalemia occurs commonly with diuretics (see ), and electrolyte monitoring is essential, particularly in patients who would be at increased risk from hypokalemia, such as those with cardiac arrhythmias or who are receiving concomitant cardiac glycosides.

In general, diuretics should not be given concomitantly with lithium because they reduce its renal clearance and add a high risk of lithium toxicity. Read prescribing information for lithium preparations before use of such concomitant therapy.


What might happen if I take too much Indapamide?

Symptoms of overdosage include nausea, vomiting, weakness, gastrointestinal disorders and disturbances of electrolyte balance. In severe instances, hypotension and depressed respiration may be observed. If this occurs, support of respiration and cardiac circulation should be instituted. There is no specific antidote. An evacuation of the stomach is recommended by emesis and gastric lavage after which the electrolyte and fluid balance should be evaluated carefully.


How should I store and handle Indapamide?

Protect from light. Store at 20° to 25°C (68° to 77°F); excursions permitted from 15° to 30°C (59° to 86°F) [].Indapamide Tablets, USP are available as follows:1.25 mg — Each orange, round, compound cup, film-coated tablet imprinted with on one side and 597 on the other side contains 1.25 mg of indapamide, USP. Tablets are supplied in bottles of 90 (NDC 42291-348-90). 2.5 mg — Each white, round, compound cup, film-coated tablet imprinted with on one side and 571 on the other side contains 2.5 mg of indapamide, USP. Tablets are supplied in bottles of 90 (NDC 42291-349-90). Keep tightly closed.Store at controlled room temperature 20° to 25°C (68° to 77°F) [see USP]. Avoid excessive heat.Dispense in a tight, light-resistant container as defined in the USP.Manufactured for: AvKARE, Inc. Pulaski, TN 38478 Mfg. Rev. 06/12 AV 02/16 (P) Indapamide Tablets, USP are available as follows:1.25 mg — Each orange, round, compound cup, film-coated tablet imprinted with on one side and 597 on the other side contains 1.25 mg of indapamide, USP. Tablets are supplied in bottles of 90 (NDC 42291-348-90). 2.5 mg — Each white, round, compound cup, film-coated tablet imprinted with on one side and 571 on the other side contains 2.5 mg of indapamide, USP. Tablets are supplied in bottles of 90 (NDC 42291-349-90). Keep tightly closed.Store at controlled room temperature 20° to 25°C (68° to 77°F) [see USP]. Avoid excessive heat.Dispense in a tight, light-resistant container as defined in the USP.Manufactured for: AvKARE, Inc. Pulaski, TN 38478 Mfg. Rev. 06/12 AV 02/16 (P) Indapamide Tablets, USP are available as follows:1.25 mg — Each orange, round, compound cup, film-coated tablet imprinted with on one side and 597 on the other side contains 1.25 mg of indapamide, USP. Tablets are supplied in bottles of 90 (NDC 42291-348-90). 2.5 mg — Each white, round, compound cup, film-coated tablet imprinted with on one side and 571 on the other side contains 2.5 mg of indapamide, USP. Tablets are supplied in bottles of 90 (NDC 42291-349-90). Keep tightly closed.Store at controlled room temperature 20° to 25°C (68° to 77°F) [see USP]. Avoid excessive heat.Dispense in a tight, light-resistant container as defined in the USP.Manufactured for: AvKARE, Inc. Pulaski, TN 38478 Mfg. Rev. 06/12 AV 02/16 (P) Indapamide Tablets, USP are available as follows:1.25 mg — Each orange, round, compound cup, film-coated tablet imprinted with on one side and 597 on the other side contains 1.25 mg of indapamide, USP. Tablets are supplied in bottles of 90 (NDC 42291-348-90). 2.5 mg — Each white, round, compound cup, film-coated tablet imprinted with on one side and 571 on the other side contains 2.5 mg of indapamide, USP. Tablets are supplied in bottles of 90 (NDC 42291-349-90). Keep tightly closed.Store at controlled room temperature 20° to 25°C (68° to 77°F) [see USP]. Avoid excessive heat.Dispense in a tight, light-resistant container as defined in the USP.Manufactured for: AvKARE, Inc. Pulaski, TN 38478 Mfg. Rev. 06/12 AV 02/16 (P) Indapamide Tablets, USP are available as follows:1.25 mg — Each orange, round, compound cup, film-coated tablet imprinted with on one side and 597 on the other side contains 1.25 mg of indapamide, USP. Tablets are supplied in bottles of 90 (NDC 42291-348-90). 2.5 mg — Each white, round, compound cup, film-coated tablet imprinted with on one side and 571 on the other side contains 2.5 mg of indapamide, USP. Tablets are supplied in bottles of 90 (NDC 42291-349-90). Keep tightly closed.Store at controlled room temperature 20° to 25°C (68° to 77°F) [see USP]. Avoid excessive heat.Dispense in a tight, light-resistant container as defined in the USP.Manufactured for: AvKARE, Inc. Pulaski, TN 38478 Mfg. Rev. 06/12 AV 02/16 (P) Indapamide Tablets, USP are available as follows:1.25 mg — Each orange, round, compound cup, film-coated tablet imprinted with on one side and 597 on the other side contains 1.25 mg of indapamide, USP. Tablets are supplied in bottles of 90 (NDC 42291-348-90). 2.5 mg — Each white, round, compound cup, film-coated tablet imprinted with on one side and 571 on the other side contains 2.5 mg of indapamide, USP. Tablets are supplied in bottles of 90 (NDC 42291-349-90). Keep tightly closed.Store at controlled room temperature 20° to 25°C (68° to 77°F) [see USP]. Avoid excessive heat.Dispense in a tight, light-resistant container as defined in the USP.Manufactured for: AvKARE, Inc. Pulaski, TN 38478 Mfg. Rev. 06/12 AV 02/16 (P) Indapamide Tablets, USP are available as follows:1.25 mg — Each orange, round, compound cup, film-coated tablet imprinted with on one side and 597 on the other side contains 1.25 mg of indapamide, USP. Tablets are supplied in bottles of 90 (NDC 42291-348-90). 2.5 mg — Each white, round, compound cup, film-coated tablet imprinted with on one side and 571 on the other side contains 2.5 mg of indapamide, USP. Tablets are supplied in bottles of 90 (NDC 42291-349-90). Keep tightly closed.Store at controlled room temperature 20° to 25°C (68° to 77°F) [see USP]. Avoid excessive heat.Dispense in a tight, light-resistant container as defined in the USP.Manufactured for: AvKARE, Inc. Pulaski, TN 38478 Mfg. Rev. 06/12 AV 02/16 (P)


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Clinical Information

Chemical Structure

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Clinical Pharmacology

Indapamide is the first of a new class of antihypertensive/diuretics, the indolines. The oral administration of 2.5 mg (two 1.25 mg tablets) of indapamide to male subjects produced peak concentrations of approximately 115 ng/mL of the drug in blood within two hours. The oral administration of 5 mg (two 2.5 mg tablets) of indapamide to healthy male subjects produced peak concentrations of approximately 260 ng/mL of the drug in the blood within two hours. A minimum of 70% of a single oral dose is eliminated by the kidneys and an additional 23% by the gastrointestinal tract, probably including the biliary route. The half-life of indapamide in whole blood is approximately 14 hours.

Indapamide is preferentially and reversibly taken up by the erythrocytes in the peripheral blood. The whole blood/plasma ratio is approximately 6:1 at the time of peak concentration and decreases to 3.5:1 at eight hours. From 71 to 79% of the indapamide in plasma is reversibly bound to plasma proteins.

Indapamide is an extensively metabolized drug, with only about 7% of the total dose administered, recovered in the urine as unchanged drug during the first 48 hours after administration. The urinary elimination of C-labeled indapamide and metabolites is biphasic with a terminal half-life of excretion of total radioactivity of 26 hours.

In a parallel design double-blind, placebo controlled trial in hypertension, daily doses of indapamide between 1.25 mg and 10 mg produced dose-related antihypertensive effects. Doses of 5 and 10 mg were not distinguishable from each other although each was differentiated from placebo and 1.25 mg indapamide. At daily doses of 1.25 mg, 5 mg and 10 mg, a mean decrease of serum potassium of 0.28, 0.61 and 0.76 mEq/L, respectively, was observed and uric acid increased by about 0.69 mg/100 mL.

In other parallel design, dose-ranging clinical trials in hypertension and edema, daily doses of indapamide between 0.5 and 5 mg produced dose-related effects. Generally, doses of 2.5 and 5 mg were not distinguishable from each other although each was differentiated from placebo and from 0.5 or 1 mg indapamide. At daily doses of 2.5 and 5 mg a mean decrease of serum potassium of 0.5 and 0.6 mEq/Liter, respectively, was observed and uric acid increased by about 1 mg/100 mL.

At these doses, the effects of indapamide on blood pressure and edema are approximately equal to those obtained with conventional doses of other antihypertensive/diuretics.

In hypertensive patients, daily doses of 1.25, 2.5 and 5 mg of indapamide have no appreciable cardiac inotropic or chronotropic effect. The drug decreases peripheral resistance, with little or no effect on cardiac output, rate or rhythm. Chronic administration of indapamide to hypertensive patients has little or no effect on glomerular filtration rate or renal plasma flow.

Indapamide had an antihypertensive effect in patients with varying degrees of renal impairment, although in general, diuretic effects declined as renal function decreased.

In a small number of controlled studies, indapamide taken with other antihypertensive drugs such as hydralazine, propranolol, guanethidine and methyldopa, appeared to have the additive effect typical of thiazide-type diuretics.

Non-Clinical Toxicology
Anuria. Known hypersensitivity to indapamide or to other sulfonamide-derived drugs.

Severe cases of hyponatremia, accompanied by hypokalemia, have been reported with recommended doses of indapamide. This occurred primarily in elderly females. (See PRECAUTIONS, ) This appears to be dose-related. Also, a large case-controlled pharmacoepidemiology study indicates that there is an increased risk of hyponatremia with indapamide 2.5 mg and 5 mg doses. Hyponatremia considered possibly clinically significant (
Hypokalemia occurs commonly with diuretics (see ), and electrolyte monitoring is essential, particularly in patients who would be at increased risk from hypokalemia, such as those with cardiac arrhythmias or who are receiving concomitant cardiac glycosides.

In general, diuretics should not be given concomitantly with lithium because they reduce its renal clearance and add a high risk of lithium toxicity. Read prescribing information for lithium preparations before use of such concomitant therapy.

Other Antihypertensives:

Lithium: See .

Post-Sympathectomy Patient: The antihypertensive effect of the drug may be enhanced in the post-sympathectomized patient.

Norepinephrine: Indapamide, like the thiazides, may decrease arterial responsiveness to norepinephrine, but this diminution is not sufficient to preclude effectiveness of the pressor agent for therapeutic use.

Hypokalemia, Hyponatremia, And Other Fluid And Electrolyte Imbalances

The risk of hypokalemia secondary to diuresis and natriuresis is increased when larger doses are used, when the diuresis is brisk, when severe cirrhosis is present and during concomitant use of corticosteroids or ACTH. Interference with adequate oral intake of electrolytes will also contribute to hypokalemia. Hypokalemia can sensitize or exaggerate the response of the heart to the toxic effects of digitalis, such as increased ventricular irritability.

Dilutional hyponatremia may occur in edematous patients; the appropriate treatment is restriction of water rather than administration of salt, except in rare instances when the hyponatremia is life threatening. However, in actual salt depletion, appropriate replacement is the treatment of choice. Any chloride deficit that may occur during treatment is generally mild and usually does not require specific treatment except in extraordinary circumstances as in liver or renal disease. Thiazide-like diuretics have been shown to increase the urinary excretion of magnesium; this may result in hypomagnesemia.

Hyperuricemia and Gout: Serum concentrations of uric acid increased by an average of 0.69 mg/100 mL in patients treated with indapamide 1.25 mg, and by an average of 1 mg/100 mL in patients treated with indapamide 2.5 mg and 5 mg, and frank gout may be precipitated in certain patients receiving indapamide (see ). Serum concentrations of uric acid should, therefore, be monitored periodically during treatment.

Renal Impairment: Indapamide, like the thiazides, should be used with caution in patients with severe renal disease, as reduced plasma volume may exacerbate or precipitate azotemia. If progressive renal impairment is observed in a patient receiving indapamide, withholding or discontinuing diuretic therapy should be considered. Renal function tests should be performed periodically during treatment with indapamide.

Impaired Hepatic Function: Indapamide, like the thiazides, should be used with caution in patients with impaired hepatic function or progressive liver disease, since minor alterations of fluid and electrolyte balance may precipitate hepatic coma.

Glucose Tolerance: Latent diabetes may become manifest and insulin requirements in diabetic patients may be altered during thiazide administration. A mean increase in glucose of 6.47 mg/dL was observed in patients treated with indapamide 1.25 mg, which was not considered clinically significant in these trials. Serum concentrations of glucose should be monitored routinely during treatment with indapamide.

Calcium Excretion: Calcium excretion is decreased by diuretics pharmacologically related to indapamide. After six to eight weeks of indapamide 1.25 mg treatment and in long-term studies of hypertensive patients with higher doses of indapamide, however, serum concentrations of calcium increased only slightly with indapamide. Prolonged treatment with drugs pharmacologically related to indapamide may in rare instances be associated with hypercalcemia and hypophosphatemia secondary to physiologic changes in the parathyroid gland; however, the common complications of hyperparathyroidism, such as renal lithiasis, bone resorption, and peptic ulcer, have not been seen. Treatment should be discontinued before tests for parathyroid function are performed. Like the thiazides, indapamide may decrease serum PBI levels without signs of thyroid disturbance.

Interaction With Systemic Lupus Erythematosus: Thiazides have exacerbated or activated systemic lupus erythematosus and this possibility should be considered with indapamide as well.

Most adverse effects have been mild and transient.

The Clinical Adverse Reactions listed in Table 1 represent data from Phase II/III placebo-controlled studies (306 patients given indapamide 1.25 mg). The clinical adverse reactions listed in Table 2 represent data from Phase II placebo-controlled studies and long-term controlled clinical trials (426 patients given indapamide 2.5 mg or 5 mg). The reactions are arranged into two groups: 1) a cumulative incidence equal to or greater than 5%; 2) a cumulative incidence less than 5%. Reactions are counted regardless of relation to drug.

All other clinical adverse reactions occurred at an incidence of
Approximately 4% of patients given indapamide 1.25 mg compared to 5% of the patients given placebo discontinued treatment in the trials of up to eight weeks because of adverse reactions.

In controlled clinical trials of six to eight weeks in duration, 20% of patients receiving indapamide 1.25 mg, 61% of patients receiving indapamide 5 mg, and 80% of patients receiving indapamide 10 mg had at least one potassium value below 3.4 mEq/L. In the indapamide 1.25 mg group, about 40% of those patients who reported hypokalemia as a laboratory adverse event returned to normal serum potassium values without intervention. Hypokalemia with concomitant clinical signs or symptoms occurred in 2% of patients receiving  indapamide 1.25 mg.

Because most of these data are from long-term studies (up to 40 weeks of treatment), it is probable that many of the adverse experiences reported are due to causes other than the drug. Approximately 10% of patients given indapamide discontinued treatment in long-term trials because of reactions either related or unrelated to the drug.

Hypokalemia with concomitant clinical signs or symptoms occurred in 3% of patients receiving indapamide 2.5 mg q.d. and 7% of patients receiving indapamide 5 mg q.d. In long-term controlled clinical trials comparing the hypokalemic effects of daily doses of indapamide and hydrochlorothiazide, however, 47% of patients receiving indapamide 2.5 mg, 72% of patients receiving indapamide 5 mg, and 44% of patients receiving hydrochlorothiazide 50 mg had at least one potassium value (out of a total of 11 taken during the study) below 3.5 mEq/L. In the indapamide 2.5 mg group, over 50% of those patients returned to normal serum potassium values without intervention.

In clinical trials of six to eight weeks, the mean changes in selected values were as shown in the tables below.

No patients receiving indapamide 1.25 mg experienced hyponatremia considered possibly clinically significant (
Indapamide had no adverse effects on lipids.

The following reactions have been reported with clinical usage of indapamide: jaundice (intrahepatic cholestatic jaundice), hepatitis, pancreatitis, and abnormal liver function tests. These reactions were reversible with discontinuance of the drug.

Also reported are erythema multiforme, Stevens-Johnson Syndrome, bullous eruptions, purpura, photosensitivity, fever, pneumonitis, anaphylactic reactions, agranulocytosis, leukopenia, thrombocytopenia and aplastic anemia. Other adverse reactions reported with antihypertensive/diuretics are necrotizing angiitis, respiratory distress, sialadenitis, xanthopsia.

To report SUSPECTED ADVERSE REACTIONS contact AvKARE, Inc. at 1-855-361-3993; email

; or FDA at 1-800-FDA-1088 or

.

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Reference

This information is obtained from the National Institute of Health's Standard Packaging Label drug database.
"https://dailymed.nlm.nih.gov/dailymed/"

While we update our database periodically, we cannot guarantee it is always updated to the latest version.

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Clonazepam Description Each single-scored tablet, for oral administration, contains 0.5 mg, 1 mg, or 2 mg Clonazepam, USP, a benzodiazepine. Each tablet also contains corn starch, lactose monohydrate, magnesium stearate, microcrystalline cellulose, and povidone. Clonazepam tablets USP 0.5 mg contain Yellow D&C No. 10 Aluminum Lake. Clonazepam tablets USP 1 mg contain Yellow D&C No. 10 Aluminum Lake, as well as FD&C Blue No. 1 Aluminum Lake. Chemically, Clonazepam, USP is 5-(o-chlorophenyl)-1,3-dihydro-7-nitro-2H-1,4-benzodiazepin-2-one. It is a light yellow crystalline powder. It has the following structural formula: C15H10ClN3O3 M.W. 315.72
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Interactions

Interactions

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