"March 5, 2013 -- Spring allergy season is again off to an early start in many parts of the country, and doctors say there are some signs it may be even more miserable than usual this year.
Last year was the fourth warmest winter on re"...
Antihistaminic and decongestant actions
Chlorpheniramine maleate possesses H1 antihistaminic activity and mild anticholinergic and sedative effects. Peak plasma concentration is reached in 5 hours. Urinary excretion is the major route of elimination. The liver is assumed to be the major site of metabolic transformation.
Phenylephrine hydrochloride is an oral sympathomimetic amine that acts as a decongestant to respiratory tract mucous membranes. While its vasoconstrictor action is similar to that of ephedrine, phenylephrine has less pressor effect in normotensive adults. Serum half-life for phenylephrine is 6 to 8 hours. Acidic urine is associated with faster elimination of the drug. About one-half of the administered dose is excreted in the urine.
Last reviewed on RxList: 4/9/2009
This monograph has been modified to include the generic and brand name in many instances.
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