What did mia Wallace od on in pulp fiction?

Mia Wallace, the character played by Uma Thurman in Quentin Tarantino's *Pulp Fiction*, did not overdose on drugs.

She did, however, experience a near-death experience due to a heroin overdose in the film. She is revived by her husband, Marcellus Wallace, using a shot of adrenaline. This event becomes a pivotal turning point in the film, significantly impacting the story and the characters involved.

While the film doesn't explicitly state the type of drug she overdosed on, the context and subsequent events strongly suggest it was heroin.