Terbutaline C max is approximately 8.5 ng/mL; T max is about 1 to 3 h, and AUC is approximately 54 h•ng/mL. Terbutaline bioavailability is 103%.
The sulfate conjugate is the major metabolite.
Terbutaline t ½ is about 3.4 h. Approximately 90% is excreted in urine at 96 h after subcutaneous administration, with about 60% being unchanged drug. Urinary excretion is the primary route of elimination.
Onset of action is 30 min.
Time to peak effect of terbutaline is 120 to 180 min.
Duration of action is 4 h or longer.