Xanax is designed to last up to six hours. That is great news! However, the question becomes how quickly it will start to work. The answer depends on a few variables.
Everyone’s body is different. We all have different metabolisms, different absorption rates, age even factors in to the equation. Xanax’s full effects are designed to take effect within 1 1/2 hours. You may start to feel the effects sooner than that. The more frequently you take Xanax, the sooner you will see effects.
If it has been more than 1 1/2 hours and you have not gotten relief yet, or if the drug has wore off before your next dose is due, do not take another dose. Maintain the prescribed schedule and dosage. You may need to talk to your doctor and see about increasing dosage or being prescribed Xanax XR. If a dose has been missed, take it as soon as you realize you have missed it, unless it is close to your next scheduled dose. If it is close to your next dose, simply wait until the next dose is due and get back on schedule. Never double up dosages. Overdose is a very serious side effect and should be reported immediately, should it occur.