It is generally safe to give Ventolin one hour after giving Alvesco. Ventolin is typically used as a rescue medication for asthma symptoms, so it can be administered as needed. Over time, the effects of Alvesco should help reduce the need for Ventolin. If your child is experiencing coughing fits in the evening, it is important to determine the underlying cause (such as a cold, flu, asthma, etc.) in order to provide appropriate treatment.