Take 1 to 2 tablets every 4 to 6 hours as needed, but do not exceed 6 doses per day.
Swallow tablets with plenty of water to aid absorption.
Do not take more than 6 doses in 24 hours. If you do, seek medical advice promptly.
Type of medicine | Antihistamine - First-generation |
Used for | Allergic rhinitis |
Active ingredient(s) | Diphenhydramine |
Works by | Blocking the effects of histamine |
Effective within | 15 minutes |
Available as | Tablets |
Available strength | 25mg |
Usage | 1 to 2 tablets every 4 to 6 hours |
Manufacturer | Various |
Packaging | Blister pack |
Storage | Store at room temperature and keep out of reach and sight from children |
Prescription required? | No |
Who can consult | Adults with allergic rhinitis |
Benadryl contains diphenhydramine, a first-generation antihistamine used to relieve hay fever and allergy symptoms. It works by blocking the effects of histamine in the body, which cause sneezing, a runny nose, and itchy or watery eyes. As a sedating antihistamine, it may also help with short-term insomnia or motion sickness.
Yes. Benadryl and Diphenhydramine contain the same active ingredient, diphenhydramine. Diphenhydramine is the generic version, whilst Benadryl is the branded version. Both work the same way to relieve hay fever and allergy symptoms.
If you are 12 or older and experience allergic rhinitis (hay fever) or other allergy symptoms, you can use Benadryl to relieve symptoms.
Do not take Benadryl if you:
Use with caution if you:
For a complete list of precautions and medicine interactions, consult the patient information leaflet.
Common side effects include:
Stop using and speak to your doctor if you experience:
Seek immediate help if you experience any symptoms of an allergic reaction such as:
Benadryl can cause drowsiness and dizziness. Avoid driving or operating machinery until you know how it affects you.
Benadryl usually takes around 15 to 30 minutes to start working. Full effect is typically felt within 1 to 2 hours, lasting around 4 to 6 hours.
You will need to complete a short consultation form. This allows our doctors to check that the medicine is safe and appropriate for you.
If suitable, your treatment will be prepared and dispatched directly to you.