Dilution: Sugar-free formulation: VENTOLIN Syrup may be diluted with Purified Water BP (50% v/v). The resulting mixture should be protected from light and used within 28 days. A 50% v/v dilution of VENTOLIN Syrup has been shown to be adequately preserved against microbial contamination. However, to avoid the possibility of introducing excessive microbial contamination, the Purified Water used for dilution should be recently prepared or alternatively it should be boiled and cooled immediately before use. Admixture of VENTOLIN Syrup with other liquid preparation is not recommended.