Taking Sinarest and Montina L together may cause increased drowsiness, dry mouth, or mild dizziness because both medications contain antihistamines. Since this was an accidental one-time dose, the best thing to do is stay well-hydrated, rest, and avoid driving or any tasks requiring focus. Monitor how you feel over the next few hours. If you experience severe sleepiness, a rapid heartbeat, or any difficulty breathing, please consult a doctor.
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What should I do if I accidentally took Sinarest and Montina L together, and should I try to make myself vomit?