A member asked:

After how many hours are the nodoz (caffeine) going to wear off?

3 doctors weighed in across 2 answers
Dr. R Sangal answered

Half-life 5-6 hours: The half-life of caffeine is 5-6 hours, which means the amount in your blood (and therefore the effect) decreases by half in 5-6 hours. How long it works will depend not just on the half-life but also on the dose taken.

Answered 8/8/2014

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Dr. Heidi Fowler answered

Specializes in Psychiatry

Manufacturer info:: "With different ages, sizes, and caffeine tolerance, the time that it takes for No-Doz to begin affecting you and the time No-Doz will remain in your system varies. On average, it can take 10 to 30 minutes to begin and the effect lasts for at least 3 hours and may in some cases last much longer." http://www.nodoz.com.au/faq.php

Answered 8/8/2014

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Related Questions

A member asked:

How many hours before my bedtime, should I stop drinking caffeine ?

3 doctors weighed in across 2 answers