Can I take Allerwel am and Rapitus syrup together?
Drug interaction guide
Originally published 14 Mar 2026
Meets Patient’s editorial guidelines
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Taking these two medicines together can make you feel very sleepy, dizzy, and less alert than usual. It may also cause increased dry mouth, blurred vision, or constipation.
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Why this happens
Both medicines contain ingredients that affect the central nervous system. Allerwel AM contains Levocetirizine (an antihistamine) and Ambroxol (a mucus thinner). Rapitus Syrup contains Levodropropizine (a cough suppressant). Both the antihistamine and the cough suppressant can cause drowsiness; when taken together, this effect is 'doubled up' or intensified.
What you should do
Back to contentsUse this combination with caution. Do not drive, operate heavy machinery, or perform tasks that require full alertness until you know how these medicines affect you. Avoid drinking alcohol while taking these treatments, as it will make the sleepiness much worse. If you feel excessively drowsy or have difficulty breathing, contact your doctor.
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Using other medicines
Back to contentsTaking multiple medicines? Our Medicines Interaction Checker helps you check whether your prescriptions, over-the-counter medicines, and supplements are safe to take together. Simply search for your medicines to see potential interactions and what to do about them.
Disclaimer
This information is for general educational purposes only and should not be relied upon as a substitute for professional medical advice. Always consult your GP, pharmacist, or another qualified healthcare professional before making decisions about your medications. Individual circumstances may vary, and only a healthcare professional who knows your medical history can provide personalised guidance.
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Article history
The information on this page is written and peer reviewed by qualified clinicians.
14 Mar 2026 | Originally published

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