Green’s Dictionary of Slang

(US drugs) a hypodermic needle.

1918		H. Simon ‘Prison Dict.’ in AS VIII:3 (1933) 28/1: HYPESTICK. Hypodermic needle.
1949		Monteleone Criminal Sl. (rev. edn).
1959		J.E. Schmidt Narcotics Lingo and Lore.
1992		Bentley & Corbett Prison Sl. 82: Fit Originally called Outfit, the term refers to the needle and syringe a person uses to inject drugs intravenously [...] (Archaic: hype stick).
2001		ONDCP Street Terms 12: Hype stick — Hypodermic needle.