3 Safe setting. Ketamine can make you incoordinated and confused, putting you at risk of injury. You should avoid driving or being in a public place when you take the drug. Cetirizine tablets and liquid that you buy from pharmacies and supermarkets can be taken by adults and children aged 6 and older. Children over the age of 2 can also take liquid cetirizine for hay fever and skin allergies. Skeeter Syndrome is an allergy to mosquito saliva. It can present with extreme swelling, itching, blistering, infection, fever and in some cases anaphylactic shock, asthma and cellulitis. If you or your child has a minor health complaint and you're already entitled to a free prescription, you may also be able to get free non-prescription medicines and treatments through the little-known NHS minor ailments scheme. What is cetirizine. Cetirizine or cetirizine hydrochloride (cetirizine HCL) is a non-drowsy antihistamine medicine that relieves the symptoms of allergies by blocking the effects of the chemical histamine in your body. Spending time in the sun is all part of the fun of summer. It is important that we protect ourselves against the harmful damage that can be caused by ultraviolet (UV) rays.