"治疗胸肺药物" can be translated into English as "medications for treating chest and lung conditions" or more concisely as "chest and lung therapeutic drugs".
Both translations convey the meaning of drugs intended for the treatment of diseases or conditions affecting the chest and lungs. The first option is more descriptive, specifying the purpose (treating) and the target areas (chest and lung conditions), while the second option is more direct and concise, using "therapeutic" to indicate the medicinal purpose.