30 to 60minutes
An intravenous injection.
site of action is the location (site) where the drug do there action ........ while onset of action is the starting of effects produced due to drug............... both are clearly different..........
Prophylaxis or primary prevention mean action delaying onset of disease.
30-90 minutes.
The onset of action for SSRIs (selective serotonin reuptake inhibitors) typically ranges from 1 to 4 weeks before noticeable improvement in symptoms is observed.
Intravenous
IV
Loop diuretics have the quickest onset of action. They are called loop diuretics because they act in the loop of henle in the kidneys. The main loop diuretics are: Furosemide, Bumetanide and Torasemide
Because they are quickly metabolized by the liver.
Depends on the type of insulin -- in fact, the "onset time", "peak time" and "duration" of a particular insulin differs from one type to another. You're asking about "onset time", which varies from about 15 minutes to about 3 hours depending on the insulin type and the individual. Duration can be anywhere from 3 hours to 24, again depending. See the link below ("Types of Insulin and their action profiles") for typical onset, peak, and duration numbers for various commonly sold insulins.
An intravenous injection goes directly to the blood stream and its action is faster than the other types of injection.
Injection tends to lead to the most rapid action of drugs.