Absorption: Negligible absorption following inhalation.

Distribution: Action is primarily local.

Metabolism and Excretion: Unknown.

Half-life: Unknown.

TIME/ACTION PROFILE (effect on noted parameters)

ROUTE	ONSET	PEAK	DURATION
Inhalation	within 15 min†	3 days–1 wk‡ weeks–months§	48 hr

†Significant concentrations in sputum
‡Improvement in respiratory function
§Decreased incidence of respiratory tract infections