How can i prevent myself from falling asleep while standing up?

Sleep better: Make sure you are getting enough sleep. It is crucial for your health. If you snore get it checked. If not you need to see a sleep specialist to rule out other problems like narcolepsy.

Unusual: Sleeping in unusual positions or situations indicate the possibility of what we call sleep attacks, a symptom of narcolepsy. This can result in bodily injury. You should see a sleep specialist asap.