30-90 minutes.
1mg Xanax = 2mg Ativan or 20mg Valium. You also have to consider onset and duration of action. Xanax is very fast-acting but only has a half-life of 6-12 hours. Ativan has a relatively quick onset with a half-life of 10-20 hours. Valium on the other hand, is a slow-acting benzo and stays in your system for days.
In my personal use, if the xanax is taken at the earliest moment of the onset of a migraine, I have been able to control the migraine.
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.
Eating can affect the absorption and effectiveness of Xanax (alprazolam), as food can alter how the medication is processed in the body. Taking Xanax on a full stomach may delay its onset of action, while taking it on an empty stomach could lead to a more rapid effect. However, the overall impact can vary from person to person. It's essential to follow your doctor's advice regarding medication and food interactions.
30 to 60minutes
The onset of action for SSRIs (selective serotonin reuptake inhibitors) typically ranges from 1 to 4 weeks before noticeable improvement in symptoms is observed.
An intravenous injection.
Intravenous
IV
Yes, they are both benzodiazepines so "crossing over" is possible. It should be noted, however, that Xanax is roughly twice as potent as Ativan and has a much faster half-life so it may seem like the Ativan is not as effective in someone who is used to the rapid onset of Xanax. Of course, some people find that Ativan works better than Xanax for anxiety. It just depends on the person and what your taking it for
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