tonic drink
A drink intended to restore vitality or strength; often used in product names or health contexts.
This tonic drink is said to be effective for recovering from fatigue.
栄養ドリンク is a more common term for nutritional/energy drinks, while 滋強飲料 is a less frequent, somewhat formal or product-oriented term.
Compound of 滋 (nourishing), 強 (strengthening), and 飲料 (beverage). The exact origin is uncertain, but it likely arose as a descriptive term for health tonics.