A loading dose is
A: smaller than the maintenance dose
B: unnecessary for benzylpenicillin (t1/2=30min)
C: equal to the amount of drug which is eliminated in a dose interval
D: necessary if a rapid onset of action of digoxin (t1/2=36-48),
A: smaller than the maintenance dose
B: unnecessary for benzylpenicillin (t1/2=30min)
C: equal to the amount of drug which is eliminated in a dose interval
D: necessary if a rapid onset of action of digoxin (t1/2=36-48),
举一反三
- Efficacy means A: the concentration at which the drug elicits 50% of its maximal effect B: the maximal effect produced by the drug C: the dose at which 50% of subjects exhibit a therapeutic response to a drug D: the dose at which 50% of subjects dies E: the dose at which 50% of subjects exhibit a toxic reaction
- 已知向量=(2，t),=(1，2)，若t=t1时，∥；t=t2时，⊥,则（ ） A: t1=-4，t2=-1 B: t1=-4，t2=1 C: t1=4，t2=-1 D: t1=4，t2=1
- Which of the following belongs to the drug factors affecting drug efficacy? A: Dosage form B: Dose C: Age D: Gender E: Race
- High level of the drug can _________ if you take a dose too soon.
- ED50 means A: Median effective concentration B: Median toxic dose C: Median lethal dose D: Median effective dose