Urgent need to ward off sleep! Is there any solution other than Caffeine?

Try taking a real cold shower.

No magic solution. Take a short power nap...and it might be more productive than anything else you try. In my studying days I listen to 15 heavy metal music to keep awake. Amazing what that can do. Just remember to restore equilibrium to your brain you have to sleep 4 hrs to every 15 minutes of music you listen to. That stuff is poison! High risk activity.

Caffeine in double?