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Pet Info  > Dermatology  > Treatments  > Antihistamines
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Antihistamines and Evening Primrose Oil

A combination of Evening Primrose Oil and antihistamines provides marked reduction in allergy related skin problems in a large number of itchy pets.

Remember to keep using the Dermcare shampoos as the main cornerstone of your control of allergy related secondary problems.

You will probably have to experiment a bit with the dose and/or type of anti-histamine you use as results vary from pet to pet. Ask your vet for those anti-histamines he/she uses (overseas brands vary from here).

Evening Primrose oil comes either in capsules or liquid. Ask your vet for the most economical formulation. We use Megaderm (a liquid formulation). It is given by mouth once a day along with the anti-histamine tablets.

Antihistamine

Dose

Drowsiness

Benadryl
   Liquid

2 mg/kg 3 times a day

Yes

Piriton
   4 mg tablets

4-12 mg/dog twice a day
4 mg/cat twice a day
(Drug of choice in cats)

Yes

Periactin
   4 mg tablets
   Liquid- 1.2 mg/5mls

0.2 mg/kg twice a day

Yes

Telfast
   60 mg tablets

2 mg/kg twice a day

No

Phenergan
   10 mg tablets
   25 mg tablets

2 mg/kg twice a day

Yes

To test the effectiveness, you must continue for at least 35 days. If no improvement, then try a different brand of anti-histamines.