Green’s Dictionary of Slang

(drugs) amphetamine.

1969		R.R. Lingeman Drugs from A to Z (1970).
1977		A. Brooke Last Toke 27: ‘Ain’t particular,’ Jamaca said, eyes aglow with the need to fly high. ‘Crossroads?’ Jamaca nodded.
2001		ONDCP Street Terms 7: Crossroads — Amphetamine.