Green’s Dictionary of Slang

(US drugs) amphetamine.

1970		R. Gilmore Drug Education Hbk.
1976		(ref. to 1960s) R. Sabbag Snowblind (1978) 240: The most popular word is ups. Brain ticklers, browns, cartwheels, chalk, Christmas trees, coast-to-coasts [...] are words of the sixties and are out of use now.
2001		ONDCP Street Terms 6: Coasts to coasts — Amphetamine.