ひんぱんに吐血する場合は、救急車を呼ぶか、近くの内科医に往診してもらう。

If you frequently spit-up blood you should call an ambulance or have a nearby physician make a house call.

内科はどこですか。

Where is the Internal Medicine Department?

この薬を飲む前には内科医の意見を聞くべきだ。

You should ask a physician for his advice before taking this medicine.