Triamterene Capsules
Generic Name: triamterene capsules
Brand Names:
Triamterene
DESCRIPTION Triamterene Capsules are potassium-sparing diuretics. Triamterene Triamterene is 2,4,7-triamino-6-phenyl-pteridine. Its molecular weight is 253.27. At 50°C, triamterene is slightly soluble in water. It is soluble in dilute ammonia, dilute aqueous sodium hydroxide and dimethylformamide. It is sparingly soluble in methanol.
Overview
DESCRIPTION Triamterene Capsules are potassium-sparing diuretics. Triamterene Triamterene is 2,4,7-triamino-6-phenyl-pteridine. Its molecular weight is 253.27. At 50°C, triamterene is slightly soluble in water. It is soluble in dilute ammonia, dilute aqueous sodium hydroxide and dimethylformamide. It is sparingly soluble in methanol.
Uses
INDICATIONS & USAGE Triamterene Capsules USP is indicated in the treatment of edema associated with congestive heart failure, cirrhosis of the liver and the nephrotic syndrome; steroid-induced edema, idiopathic edema and edema due to secondary hyperaldosteronism. Triamterene Capsules USP may be used alone or with other diuretics, either for its added diuretic effect or its potassium-sparing potential. It also promotes increased diuresis when patients prove resistant or only partially responsive to thiazides or other diuretics because of secondary hyperaldosteronism. Usage in Pregnancy. The routine use of diuretics in an otherwise healthy woman is inappropriate and exposes mother and fetus to unnecessary hazard.
Dosage
DOSAGE & ADMINISTRATION Adult Dosage Dosage should be titrated to the needs of the individual patient. When used alone, the usual starting dose is 100 mg twice daily after meals. When combined with another diuretic or antihypertensive agent, the total daily dosage of each agent should usually be lowered initially and then adjusted to the patient’s needs. The total daily dosage should not exceed 300 mg. Please refer to PRECAUTIONS−General. When triamterene capsules are added to other diuretic therapy or when patients are switched to triamterene capsules from other diuretics, all potassium supplementation should be discontinued.
Side Effects
ADVERSE REACTIONS Adverse effects are listed in decreasing order of frequency; however, the most serious adverse effects are listed first, regardless of frequency. All adverse effects occur rarely (that is, 1 in 1000, or less). Hypersensitivity: anaphylaxis, rash, photosensitivity. Metabolic: hyperkalemia, hypokalemia. Renal: azotemia, elevated BUN and creatinine, renal stones, acute interstitial nephritis (rare), acute renal failure (one case of irreversible renal failure has been reported). Gastrointestinal: jaundice and/or liver enzyme abnormalities, nausea and vomiting, diarrhea. Hematologic: thrombocytopenia, megaloblastic anemia. Central Nervous System: weakness, fatigue, dizziness, headache, dry mouth.
Interactions
DRUG INTERACTIONS Caution should be used when lithium and diuretics are used concomitantly because diuretic-induced sodium loss may reduce the renal clearance of lithium and increase serum lithium levels with risk of lithium toxicity. Patients receiving such combined therapy should have serum lithium levels monitored closely and the lithium dosage adjusted if necessary. A possible interaction resulting in acute renal failure has been reported in a few subjects when indomethacin, a nonsteroidal anti-inflammatory agent, was given with triamterene. Caution is advised in administering nonsteroidal anti-inflammatory agents with triamterene.
Warnings
WARNINGS Abnormal elevation of serum potassium levels (greater than or equal to 5.5 mEq/liter) can occur with all potassium-sparing agents, including triamterene. Hyperkalemia is more likely to occur in patients with renal impairment and diabetes (even without evidence of renal impairment), and in the elderly or severely ill. Since uncorrected hyperkalemia may be fatal, serum potassium levels must be monitored at frequent intervals especially in patients receiving triamterene, when dosages are changed or with any illness that may influence renal function. There have been isolated reports of hypersensitivity reactions; therefore, patients should be observed regularly for the possible occurrence of blood dyscrasias, liver damage or other idiosyncratic reactions. CONTRAINDICATIONS Anuria. Severe or progressive kidney disease or dysfunction, with the possible exception of nephrosis. Severe hepatic disease. Hypersensitivity to the drug or any of its components.
Pregnancy
PREGNANCY Teratogenic Effects: Reproduction studies have been performed in rats at doses as high as 20 times the Maximum Recommended Human Dose (MRHD) on the basis of body weight, and 6 times the MRHD on the basis of body-surface area, without evidence of harm to the fetus due to triamterene. Because animal reproduction studies are not always predictive of human response, this drug should be used during pregnancy only if clearly needed. Nonteratogenic Effects: Triamterene has been shown to cross the placental barrier and appear in cord blood.
Storage
HOW SUPPLIED Each capsule for oral use, with opaque red cap and body, contains Triamterene USP, 50 mg or 100 mg, and is imprinted with AT 50 (for the 50-mg strength) and AT 100 (for the 100-mg strength) in white ink on both the cap and body and they are available as follows.
Frequently Asked Questions
What is Triamterene Capsules used for?▼
INDICATIONS & USAGE Triamterene Capsules USP is indicated in the treatment of edema associated with congestive heart failure, cirrhosis of the liver and the nephrotic syndrome; steroid-induced edema, idiopathic edema and edema due to secondary hyperaldosteronism. Triamterene Capsules USP may be used alone or with other diuretics, either for its added diuretic effect or its potassium-sparing potential. It also promotes increased diuresis when patients prove resistant or only partially responsive to thiazides or other diuretics because of secondary hyperaldosteronism. Usage in Pregnancy. The routine use of diuretics in an otherwise healthy woman is inappropriate and exposes mother and fetus to unnecessary hazard.
What are the side effects of Triamterene Capsules?▼
ADVERSE REACTIONS Adverse effects are listed in decreasing order of frequency; however, the most serious adverse effects are listed first, regardless of frequency. All adverse effects occur rarely (that is, 1 in 1000, or less). Hypersensitivity: anaphylaxis, rash, photosensitivity. Metabolic: hyperkalemia, hypokalemia. Renal: azotemia, elevated BUN and creatinine, renal stones, acute interstitial nephritis (rare), acute renal failure (one case of irreversible renal failure has been reported). Gastrointestinal: jaundice and/or liver enzyme abnormalities, nausea and vomiting, diarrhea. Hematologic: thrombocytopenia, megaloblastic anemia. Central Nervous System: weakness, fatigue, dizziness, headache, dry mouth.
Can I take Triamterene Capsules during pregnancy?▼
PREGNANCY Teratogenic Effects: Reproduction studies have been performed in rats at doses as high as 20 times the Maximum Recommended Human Dose (MRHD) on the basis of body weight, and 6 times the MRHD on the basis of body-surface area, without evidence of harm to the fetus due to triamterene. Because animal reproduction studies are not always predictive of human response, this drug should be used during pregnancy only if clearly needed. Nonteratogenic Effects: Triamterene has been shown to cross the placental barrier and appear in cord blood.
What are the important warnings for Triamterene Capsules?▼
WARNINGS Abnormal elevation of serum potassium levels (greater than or equal to 5.5 mEq/liter) can occur with all potassium-sparing agents, including triamterene. Hyperkalemia is more likely to occur in patients with renal impairment and diabetes (even without evidence of renal impairment), and in the elderly or severely ill. Since uncorrected hyperkalemia may be fatal, serum potassium levels must be monitored at frequent intervals especially in patients receiving triamterene, when dosages are changed or with any illness that may influence renal function. There have been isolated reports of hypersensitivity reactions; therefore, patients should be observed regularly for the possible occurrence of blood dyscrasias, liver damage or other idiosyncratic reactions. CONTRAINDICATIONS Anuria. Severe or progressive kidney disease or dysfunction, with the possible exception of nephrosis. Severe hepatic disease. Hypersensitivity to the drug or any of its components.
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Medical Disclaimer
This drug information is for educational purposes only and should not replace professional medical advice. Drug information is sourced from the FDA National Drug Code Directory and Structured Product Labeling. Always consult with a healthcare provider before starting, stopping, or changing any medication.