chemical castration
Medical or legal term for the use of drugs to suppress sexual function, often discussed in the context of sex offender treatment.
In some countries, chemical castration is sometimes performed on sex offenders.
去勢 is a broader term for castration (surgical or chemical), while 薬物去勢 specifically refers to chemical castration using drugs.
Compound of 薬物 (drug) and 去勢 (castration).