also: こぐすり
noun
powdered medicine; medicinal powder
Refers to medicine in powder form, as opposed to tablets, capsules, or liquid.
粉薬は水で飲んでください。
Please take the powdered medicine with water.
この粉薬は苦いので、オブラートに包んで飲みます
This powder is bitter, so I take it wrapped in an oblate.