DESCRIPTION
id: 8c604833-7c0d-4fe3-bd37-11b4926ce96d
displayName: DESCRIPTION SECTION
FDA Article Code: 34089-3
Hydrochlorothiazide is a diuretic and antihypertensive. It is the 3,4-dihydro derivative of chlorothiazide. It is chemically designated as 6-chloro-3,4-dihydro-2H-1,2,4benzothiadiazine-7-sulfonamide 1,1-dioxide and has the following structural formula:
Hydrochlorothiazide is a white or almost white, crystalline powder which is very slightly soluble in water, but dissolves in dilute solutions of alkali hydroxides. Each tablet for oral administration contains 25 mg or 50 mg hydrochlorothiazide. In addition, each tablet contains the following inactive ingredients: anhydrous lactose, dibasic calcium phosphate dihydrate, croscarmellose, ferric oxide orange shade, ferric oxide yellow shade and magnesium stearate.
CLINICAL PHARMACOLOGY
id: 21a4089e-e545-4aac-bf1f-c2d32db99ccf
displayName: CLINICAL PHARMACOLOGY SECTION
FDA Article Code: 34090-1
The mechanism of the antihypertensive effect of thiazides is unknown. Hydrochlorothiazide does not usually affect normal blood pressure.
Hydrochlorothiazide affects the distal renal tubular mechanism of electrolyte reabsorption. At maximal therapeutic dosage all thiazides are approximately equal in their diuretic efficacy.
Hydrochlorothiazide increases excretion of sodium and chloride in approximately equivalent amounts. Natriuresis may be accompanied by some loss of potassium and bicarbonate.
After oral use diuresis begins within 2 hours, peaks in about 4 hours and lasts about 6 to 12 hours.
INDICATIONS AND USAGE
id: 3b610311-34b5-4336-a138-ffaaa0919b52
displayName: INDICATIONS & USAGE SECTION
FDA Article Code: 34067-9
Hydrochlorothiazide Tablets USP are indicated as adjunctive therapy in edema associated with congestive heart failure, hepatic cirrhosis, and corticosteroid and estrogen therapy.
Hydrochlorothiazide Tablets USP have also been found useful in edema due to various forms of renal dysfunction such as nephrotic syndrome, acute glomerulonephritis, and chronic renal failure.
Hydrochlorothiazide Tablets USP are indicated in the management of hypertension either as the sole therapeutic agent or to enhance the effectiveness of other antihypertensive drugs in the more severe forms of hypertension.
WARNINGS
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displayName: WARNINGS SECTION
FDA Article Code: 34071-1
Use with caution in severe renal disease. In patients with renal disease, thiazides may precipitate azotemia. Cumulative effects of the drug may develop in patients with impaired renal function.
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.
Thiazides may add to or potentiate the action of other antihypertensive drugs. Sensitivity reactions may occur in patients with or without a history of allergy or bronchial asthma.
The possibility of exacerbation or activation of systemic lupus erythematosus has been reported.
Lithium generally should not be given with diuretics (see PRECAUTIONS, Drug Interactions).
ADVERSE REACTIONS
id: f3cf35a2-ad6e-4e1b-be2d-16a4066887e8
displayName: ADVERSE REACTIONS SECTION
FDA Article Code: 34084-4
The following adverse reactions have been reported and, within each category, are listed in order of decreasing severity.
Body as a Whole
Weakness
Cardiovascular
Hypotension including orthostatic hypotension (may be aggravated by alcohol, barbiturates, narcotics or antihypertensive drugs)
Digestive
Pancreatitis, jaundice (intrahepatic cholestatic jaundice), diarrhea, vomiting, sialadenitis, cramping, constipation, gastric irritation, nausea, anorexia
Hematologic
Aplastic anemia, agranulocytosis, leukopenia, hemolytic anemia, thrombocytopenia
Hypersensitivity
Anaphylactic reactions, necrotizing angiitis (vasculitis and cutaneous vasculitis), respiratory distress including pneumonitis and pulmonary edema, photosensitivity, fever, urticaria, rash, purpura
Metabolic
Electrolyte imbalance (see PRECAUTIONS), hyperglycemia, glycosuria, hyperuricemia
Musculoskeletal
Muscle Spasm
Nervous System/Psychiatric
Vertigo, paresthesias, dizziness, headache, restlessness
Renal
Renal failure, renal dysfunction, interstitial nephritis (see WARNINGS) Skin Erythema multiforme including Stevens-Johnson syndrome, exfoliative dermatitis including toxic epidermal necrolysis, alopecia
Urogenital
Impotence
Whenever adverse reactions are moderate or severe, thiazide dosage should be reduced or therapy withdrawn.
OVERDOSAGE
id: d8f270b9-1597-4dfd-b796-c3a8940b86f4
displayName: OVERDOSAGE SECTION
FDA Article Code: 34088-5
The most common signs and symptoms observed are those caused by electrolyte depletion (hypokalemia, hypochloremia, hyponatremia) and dehydration resulting from excessive diuresis. If digitalis has also been administered, hypokalemia may accentuate cardiac arrhythmias.
In the event of overdosage, symptomatic and supportive measures should be employed. Emesis should be induced or gastric lavage performed. Correct dehydration, electrolyte imbalance, hepatic coma and hypotension by established procedures. If required, give oxygen or artificial respiration for respiratory impairment. The degree to which hydrochlorothiazide is removed by hemodialysis has not been established.
The oral LD50 of hydrochlorothiazide is greater than 10 g/kg in the mouse and rat.
DOSAGE AND ADMINISTRATION
id: 984a90e6-dd1f-44b4-96e3-589c7c7de8d5
displayName: DOSAGE & ADMINISTRATION SECTION
FDA Article Code: 34068-7
Therapy should be individualized according to patient response. Use the smallest dosage necessary to achieve the required response.
HOW SUPPLIED
id: 455ae5f7-a358-479a-a512-538833fe7df2
displayName: HOW SUPPLIED SECTION
FDA Article Code: 34069-5
Hydrochlorothiazide Tablets USP 25 mg are available for oral administration as light orange, round, scored tablets, debossed “APO” on one side and “H” bisect “25” on the other side. They are supplied as follows:
Bottles of 90 (NDC 00440-1595-90)
Storage
Store at 20° to 25°C (68° to 77°F); excursions permitted to 15° to 30°C (59° to 86°F) [see USP Controlled Room Temperature].
Dispense in a tight, light-resistant container [see USP].
Repackaged By:
Aidarex Pharmaceuticals, LLC
Corona, CA 92880
PRINCIPAL DISPLAY PANEL
id: 32292b12-d156-40c4-9365-2de814b2aed8
displayName: PACKAGE LABEL.PRINCIPAL DISPLAY PANEL
FDA Article Code: 51945-4
Representative sample of labeling (see the HOW SUPPLIED section for the complete listing):
PRINCIPAL DISPLAY PANEL – 25 mg BOTTLE LABEL
LIBERTY PHARMACEUTICALS INC. NDC 00440-1595-90
HYDROCHLOROTHIAZIDE TABLETS USP
25 mg
Rx only
90 Tablets
