Boots WebMD Partners in Health
Return To Boots

Cold & flu health centre


BMJ Group Medical Reference

We don't know if these medicines can help. Antihistamines are often used to treat allergic conditions such as hay fever. You can buy some antihistamines at a pharmacy, but you'll need a prescription from your doctor for others. They come as tablets and syrups. Some examples are acrivastine (brand name Benadryl Allergy Relief), cetirizine (Zirtek), and chlorphenamine (Piriton).

Some antihistamines can make you sleepy, so you need to be careful how you use them, especially if you operate machinery or drive a car.


allergic reaction

You have an allergic reaction when your immune system overreacts to a substance that is normally harmless. You can be allergic to particles in the air you are breathing, like pollen (which causes hay fever) or to chemicals on your skin, like detergents (which can cause a rash). People can also have an allergic reaction to drugs, like penicillin.

hay fever

You get hay fever when your immune system reacts too strongly to pollen or mould. Your doctor may call it seasonal allergic rhinitis. The most common symptoms are sneezing, a runny or blocked nose, and red, itchy eyes. You may also cough or wheeze.

For more terms related to Sinusitis


For references related to Sinusitis click here.
Last Updated: March 13, 2013
This information does not replace medical advice.  If you are concerned you might have a medical problem please ask your Boots pharmacy team in your local Boots store, or see your doctor.

Popular slideshows & tools on BootsWebMD

woman looking at pregnancy test
Early pregnancy symptoms
donut on plate
The truth about sugar addiction
smiling african american woman
Best kept secrets for beautiful hair
couple watching sunset
How much do you know?
nappy being changed
How to change your baby's nappy
woman using moisturizer
Causes and home solutions
assorted spices
Pump up the flavour with spices
bag of crisps
Food cravings that wreck your diet
woman with cucumbers on eyes
How to banish dark circles and bags
probiotic shakes
Help digestion
polka dot dress on hangar
Lose weight without dieting