This preview shows page 1. Sign up to view the full content.
Unformatted text preview: sis (congenital diseases with dysfunction of
exocrine glands. In lung, overproduction of viscid mucus). Use of antitussive is secondary to treatment of source of cough.
Example: in some asthmatics, cough is primary symptom
- would use a bronchodilator, before an antitussive Narcotic Antitussives
(codeine, etc.) • Mechanism of Action
– depresses cough center in medulla of central
nervous system • Side Effects and Cautions
– Potential for abuse
• limits usefulness of narcotic antitussives. – Constipation
– depress respiration
– cause drug dependency. Nonnarcotic Antitussives
Usually fewer G.I. symptoms • Mechanism of Action
– some are peripherally acting
• i.e. benzonatate (Tessalon®) - reduces activity of lung
stretch receptors, or benzocaine, a topical anesthetic whose
usefulness has not been established – many act centrally as do the narcotics
• do not have narcotic side effects
• dextromethorphan- half as potent as codeine, no
prescription necessary = an isomer of codeine tha...
View Full Document
- Spring '14