- K-ras gene
- Kadian
- Kahler disease
- Kaletra
- Kaposi sarcoma
- Kaposi sarcoma-associated herpesvirus
- karenitecin
- Karnofsky Performance Status
- Kassebaum Kennedy Act
- kava kava
- Keflex
- Kefzol
- keloid
- kelp
- Kemstro
- Kenalog
- Keoxifene
- Kepivance
- Keppra
- keratan sulfate
- keratinocyte growth factor
- keratoacanthoma
- Ketalar
- ketamine
- ketamine / amitriptyline NP-H cream