What drug turns red in bleach?

The drug that turns red in bleach is phenolphthalein, which is often used as a pH indicator. When phenolphthalein is mixed with bleach, it can react and produce a red color due to the oxidation process. This reaction is often used in forensic science to detect the presence of certain substances. However, it’s important to note that not all drugs will exhibit this reaction, and the specific context of the substances involved is crucial.