Side effects of using NyQuil with adhd medication?

Using NyQuil alongside ADHD medications, particularly stimulants like amphetamines or methylphenidate, can lead to increased drowsiness or sedation, as NyQuil contains antihistamines and other sedating ingredients. This combination might impair cognitive function and exacerbate attention difficulties. Additionally, if the ADHD medication is non-stimulant, the interaction can still affect overall effectiveness and lead to unwanted side effects. It's important to consult a healthcare professional before combining these medications.