A red mailbox in Seoul has a second job: it can collect old pills. Put tablets, powder medicine, or capsules in a sealed bag, mark the outside 폐의약품 (pyeuiyakpum, “waste medicine”), and place it in a mailbox. Liquid medicine, eye drops, and ointments do not go there. They belong in a dedicated waste-medicine collection box.
That split is the useful part. “Take old medicine to a pharmacy” is too vague for Seoul’s current system, and “put medicine in a mailbox” leaves out the leakable items that the city specifically excludes.
What the red mailbox accepts
Seoul says its red mailboxes have served as 24-hour collection points for waste medicine since July 2023. The mailbox route is for solid forms: tablets, powdered medicine, and capsules. Korea Post’s own guidance also says the medicine should be placed in a dedicated disposal bag or another suitable bag, sealed, and marked 폐의약품.
The bag matters because the mailbox still carries ordinary letters. A loose blister pack or open packet is not the method described by either Seoul or Korea Post. If you don’t have a special collection bag, Seoul’s guidance allows an ordinary paper bag, provided it is sealed and clearly marked on the outside.
What must use a collection box
Do not put liquid medicine into the mail slot. Seoul’s current guidance names liquid medicine, eye drops, and ointments as items that should go to a dedicated 폐의약품 수거함 (pyeuiyakpum sugeoham, “waste-medicine collection box”) instead. The city directs residents to these boxes at places such as community service centers and public health centers.
The distinction is about the container and the risk of leakage, not whether the medicine feels “serious.” A small bottle of eye drops still belongs with the dedicated-box group. A capsule belongs with the sealed-mailbox group.
This is the quickest way to sort a mixed bag at home:
| Form | Seoul disposal point |
|---|---|
| Tablets, powder medicine, capsules | Seal in a labeled bag, then use a red mailbox or a dedicated collection box |
| Liquid medicine, eye drops, ointments | Use a dedicated waste-medicine collection box, not a mailbox |
Health supplements are another easy source of confusion. Seoul says health functional foods are not collected as waste medicine and should be handled as general waste. That rule concerns the product inside; packaging may still need to be separated according to its material.
How to find the nearest place
Seoul points residents to two official finders. The Korea Post website has a “find a mailbox near me” service, while the city’s Smart Seoul Map shows waste-medicine collection boxes. The two maps answer different questions, so choose the destination after sorting the medicine by form.
The mailbox option is especially practical outside the operating hours of a community office. Seoul describes the red boxes as available around the clock, though collection schedules and individual access conditions can vary. The city’s 2026 guidance still presents the service as active, while Korea Post’s 2024 notice confirms that existing mailboxes can accept sealed non-liquid waste medicine where the program operates.
Keep the Seoul rule in its proper scope
This is a Seoul disposal rule, not a promise that every mailbox in Korea accepts every kind of medicine. Gwangjin District’s launch notice, for example, described the same local method in 2023: sealed and labeled solid medicine could go into participating mailboxes, while liquid medicine had to use a dedicated box. Local collection arrangements should still be checked when you are outside Seoul.
In Seoul, the visual cue is easy to remember. A red mailbox can take the sealed bag of old solids. Anything that can leak should take the other route.