DuraVent DA

A commercial combination preparation, by Biovail Pharmaceuticals, containing chlorpheniramine maleate, phenylephrine hydrochloride and methscopolamine nitrate used to relieve symptoms of cold and flu. Chlorpheniramine maleate, an antihistamine, blocks the effects of histamine, thereby preventing symptoms such as sneezing and itchy, watery eyes, runny nose and itchy throat. Phenylephrine hydrochloride, a sympathomimetic agent, acts as a decongestant by inducing blood vessels constriction mediated via alpha-adrenergic receptors, thereby reducing blood flow and decreasing swelling which prevents nasal and sinus congestion. Methscopolamine nitrate, an anticholinergic agent, may reduce fluid secretions and provides a drying effect in nose, eyes and chest. (NCI Thesaurus)

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Duration of Uterine Contraction

The length of time from the beginning to the end of a single uterine contraction during the labor and childbirth process. …

Duration of Use

The amount of time that a thing is consumed or employed.

Duration of Rupture of Membrane

Duration from rupture of membranes to birth (in hours and minutes).

Duration of Dosing

The interval of time over which a course of doses occurs.

Duration of Administration

The amount of time elapsed during the administration of an agent.

Duration

The period of time during which something continues.