In an emergency situation when you are under stress, you will fatigue faster (especially mentally).

But in survival situations, you also need to remain alert, STOP (Stop, Think, Observe, Plan) and make good decisions.  A stimulant will help get you through such a short-term situation.

Also, many people have a daily addiction to coffee, which in a survival situation won’t be available. This will lead to withdrawal headaches or even migraines which you definitely don’t want to deal with in a bug-out situation.

One type of stimulant I recommend carrying is a blister pack of caffeine pills (waterproof), instead of a bottle of caffeine tablets. Each pill contains about 200mg of caffeine, which is the equivalent of 2 cups of coffee.