How long can Rystiggo 140 mg/ml solution for injection be stored outside the refrigerator, and under what conditions?

Rystiggo 140 mg/ml solution for injection may be stored outside the refrigerator for a single period of up to 20 days at room temperature (up to 25 °C), protected from light in its outer carton; do not freeze, and discard after 20 days or by the expiry date, whichever occurs first.