Indications
Methebac Tablet is used for:
Asymptomatic bacteriuria, Treatment and prophylaxis of chronic, uncomplicated lower urinary-tract infections.
Adult Dose
Oral
Asymptomatic bacteriuria, Treatment and prophylaxis of chronic, uncomplicated lower urinary-tract infections.
Adult: As methenamine hippurate: 1,000 mg bid. In catheterised patient: 1,000 mg tid.
As methenamine mandelate: 1,000 mg 4 times daily.
Child Dose
Oral
Asymptomatic bacteriuria, Treatment and prophylaxis of chronic, uncomplicated lower urinary-tract infections.
Child: <6 yr As methenamine mandelate: 18 mg/kg 4 times daily;
6-12 yr As methenamine hippurate: 500-1,000 mg bid;
As methenamine mandelate: 500 mg 4 times daily;
>12 yr: As methenamine hippurate: 1,000 mg bid. In catheterised patient: 1,000 mg tid. As methenamine mandelate: 1,000 mg 4 times daily.
Renal Dose
Renal impairment: Contraindicated.
Administration
Contra Indications
Hypersensitivity. Gout, metabolic acidosis, severe dehydration. Renal and severe hepatic impairment. Concomitant use w/ sulfonamides or alkalinising agents.
Precautions
Patient w/ indwelling urinary catheters; conditions wherein urine acidification is contraindicated or unattainable (e.g. presence of urea-splitting bacteria in the urine). Mild to moderate hepatic impairment. Childn. Pregnancy and lactation. Not intended for use in upper UTI. Monitoring Parameters Monitor urinalysis, urine culture, LFT. Maintain an acidic urine, or give supplemental acidification (e.g. ammonium Cl, ascorbic acid, methionine), if necessary.
Pregnancy-Lactation
Pregnancy Category: C
Lactation: excreted in breast milk; no adverse effects documented
Interactions
Acetazolamide may inhibit conversion of methenamine into formaldehyde.
Potentially Fatal: Risk of crystalluria when given w/ sulfonamides (e.g. sulfamethizole) or urinary alkalinising agents (e.g. potassium citrate).
Side Effects
Side effects of Methenamine :
1-10%
Dysuria
Gastric upset
Nausea
Rash
Mode of Action
Methenamine is a urinary antibacterial agent. Its action depends on its conversion in acidic urine into formaldehyde, a nonspecific bactericidal agent, that is active against both gram+ve and gram-ve bacteria.
Note
Methebac 1 gm Tablet generic name is Methenamine. Methebac 1 gm Tablet is manufactured by Navana Pharmaceuticals Ltd.Methebac is availble in all over Bangladesh.
Mes BD drug index information on Methebac Tablet is not intended for diagnosis, medical advice or treatment; neither intended to be a substitute for the exercise of professional judgment.