Antihistamines such as chlorpheniramine (piriton) and loratadine (claritin) are commonly used. They all have potential side effects and are often sedative.
Dear Anne,
I have found info on Hay fever symptoms. Hayfever, also known as seasonal allergic rhinitis, is a very common condition that affects two in every 10 people in the UK. It is caused by an allergy to airborne substances such as grass or hay pollen, which affects the upper respiratory passages (nose, sinus, throat and eyes).