noun
combined therapy; combination therapy
Medical term for using multiple treatments together, such as drugs, radiation, or other modalities.
この癌には化学療法と放射線の併用療法が効果的です。
For this cancer, combined therapy with chemotherapy and radiation is effective.
併用 means 'combined use' in general, while 併用療法 specifically refers to a combined medical treatment.
Compound of 併用 (combined use) and 療法 (therapy).