How do you say "When should I take this medicine?" in Japanese?

Quick use

Use このくすりはいつのみますか (kono kusuri wa itsu nomimasu ka) when you receive medicine and need to ask the timing clearly.

It is useful at a clinic, hospital, or pharmacy when the explanation was too fast or you are not sure whether to take it before meals, after meals, or at bedtime.

Chunk or pattern

This is partly reusable, but keep the medicine version as your main chunk.

• このくすりはいつのみますか = When should I take this medicine?
• そのくすりはいつのみますか = When should I take that medicine?

The useful pattern is:

• この / その くすり は / いつ のみますか

Core words

• くすり: medicine.
• いつ: when.
• のみます: take or drink. For medicine, it means “take.”

Helper words and endings

• は: marks what you are asking about: “as for this medicine...”
• ますか: makes the verb into a polite question.

Practical note

This asks about timing, not dosage. If you need the number of times, use このくすりは1日に何回のみますか (kono kusuri wa ichi-nichi ni nankai nomimasu ka).