～薬
～やく · ～yaku · JLPT N1 · noun
medicine
💊 Suffix: 風邪 (cold) + 薬 (medicine) = 風邪薬, cold medicine; swap in any ailment part to make a new drug name
Attach it to what the medicine treats or where it goes: 目薬 eye drops (目 eye + 薬), 頭痛薬 headache medicine (頭痛 headache + 薬). The sound is いやく/やく, read as ～やく after a noun.