Stimulants
Huperzine-A
X-tiamine (e.g. Benfotiamine (only one available in Germany), Sulbotiamine, etc.)
Vitamin-D
L-tyrosine
Caffeine Tablets + L-theanine
Theobromine (cacao beans, e.g. chocolate)
Nicotine (lozenges, gum, or patches)
Conversation (Not a drug, but very stimulating. E.g. I have multiple times talked to somebody for over 12 hours.)
Sleep
Melatonin
List of good, widely legal, and prescription-free drugs:
Stimulants
Huperzine-A
X-tiamine (e.g. Benfotiamine (only one available in Germany), Sulbotiamine, etc.)
Vitamin-D
L-tyrosine
Caffeine Tablets + L-theanine
Theobromine (cacao beans, e.g. chocolate)
Nicotine (lozenges, gum, or patches)
Conversation (Not a drug, but very stimulating. E.g. I have multiple times talked to somebody for over 12 hours.)
Sleep
Melatonin