Prison Act Article 65

Where an inmate refuses food or fails to take medicine as instructed by a doctor that may put his/her life in danger, the prison should immediately ask a doctor to provide treatment, and allow the doctor to force-feed the inmate or take medically necessary forceful measures.
中文原文 監獄行刑法第65條
受刑人因拒絕飲食或未依醫囑服藥而有危及生命之虞時,監獄應即請醫師進行診療,並得由醫師施以強制營養或採取醫療上必要之強制措施。

English translation for reference only; the Chinese text prevails. Not legal advice.