noun
injectable drug; parenteral preparation
Pharmaceutical term for a drug product intended for injection. Used in medical and pharmacological contexts.
この注射剤は冷蔵保存が必要です。
This injectable drug requires refrigerated storage.
医師は患者に新しい注射剤を処方した。
The doctor prescribed a new injectable drug for the patient.
内服薬 is an oral medication, contrasting with 注射剤 which is administered by injection.
Compound of 注射 (injection) + 剤 (drug, preparation). A straightforward modern pharmaceutical term.