Tonics taken 2–4 weeks before exam show limited effects, but specific prescriptions help: ① Saengmaek-san: rapid energy recovery (3–7 days), ② Kongjin-dan: concentration boost short-term, ③ Cheonwangbosim-dan: insomnia/anxiety relief, ④ pharmacopuncture/acupuncture: immediate effect treatments. Avoid changing constitution-based prescriptions right before exam (use what already worked). Best with adequate sleep, light exercise, and stress management combined.