Is there a Korean pharmacy in Jonggak / Jongno?
Yes. Optima Wellness Museum (OWM) Jonggak is a Korean pharmacy at B2, 41 Cheonggyecheon-ro, Jongno-gu, Seoul (Inside Youngpoong Bookstore (main store)).
It is open daily, 10:00–21:30. Pharmacists there can help with skincare, supplements and over-the-counter medicine.