Adult & childn >12 yr 10 mg (20 drops or 10 mL oral soln or 1 tab) once daily. Starting dose: 5 mg (10 drops or 5 mL oral soln or ½ tab). Childn 6-12 yr 5 mg (10 drops or 5 mL oral soln or ½ tab) bid, 2-6 yr 2.5 mg (5 drops or 2.5 mL oral soln) bid. Mild renal impairment (CrCl 50-79 mL/min) 10 mg once daily. Moderate renal impairment (CrCl 30-49 mL/min) 5 mg once daily. Severe renal impairment (CrCl <30 mL/min) 5 mg once every 2 days.
Concomitant use w/ alcohol. Increased risk of urinary retention. Epileptic patients & those at risk of convulsions. Wash-out period of 3 days before allergy skin test. Decreased rate of absorption w/ food. May impair ability to drive or operate machinery. Pregnancy & lactation. Tab: Rare hereditary problems of galactose intolerance, Lapp lactase deficiency. Childn <6 yr. Tab & soln: Glucose-galactose malabsorption. Soln: Rare hereditary problems of fructose intolerance, sucrase-isomaltase insufficiency. Soln & drops: Allergic reactions may occur due to methyl- & propyl p-hydroxybenzoate.
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