“使服毒品”常见的英文表达可以是 “force someone to take drugs” 或者 “administer drugs to someone against their will” 。
“force someone to take drugs” 直白地表达了通过强迫手段让某人服用毒品这一意思。
“administer drugs to someone against their will” 强调在违背对方意愿的情况下给予毒品，“administer”有“给予（药物等）”的意思。