For Headache and Exhaustion drink Coca Cola . named for it's medicinal ingredients, the coca leaf & the kola nut . both of which are mild stimulants & the coca is a known pain reliever & settles the stomach.
Coca-Cola, originally the ideal brain tonic. Coca-Cola is created by John Pemberton in Atlanta, GA, as a hangover cure and a stomach ache/headache remedy. Cocaine was an ingredient of Coke until 1904 when Congress banned it.