🛂 ENTERINGUnited Kingdom 
Benadryl contains Diphenhydramine. Carry it in original packaging with your prescription or a doctor's letter.
Allowed
At the border
Active ingredient · DiphenhydramineNo prescription needed
Yes - you can bring this in.
- Diphenhydramine is not specially restricted in United Kingdom.
- Keep it in original packaging and bring a reasonable personal supply.
Helpful sources
🌐MHRA — importing a medicine (GOV.UK)Official guidance↗🌐Home Office — controlled drugs & travelOfficial guidance↗To be 100% sure, we always recommend confirming with the official channels.
Medication rules vary by country and can change. This is guidance, not legal advice - carry your prescription and confirm with the official authority before you fly.