And I can speak can anyone tell me just where my medicine is

from Tech N9ne (Ft. B.o.B & Hopsin) – Am I a Psycho? Lyrics on Rap Genius

Meaning

He needs his medecine to talk clearly without Blocking.

Blocking – Interruption of train of speech before completion. e.g. “Am I early?” “No, you’re just about on…”(silence) At an extreme degree, after blocking occurs, the speaker does not recall the topic he or she was discussing.

True blocking is a common sign of schizophrenia (refering to the previous line).

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