Maxiclear Hayfever & Sinus Relief tablets are indeed an over-the-counter medication designed to alleviate symptoms associated with hayfever and sinusitis. They commonly contain a combination of active ingredients aimed at addressing different aspects of these conditions. An antihistamine such as loratadine is included to counteract the effects of histamine, a compound released by the body in response to allergens. Histamine can cause symptoms like sneezing, itching, runny nose, and watery eyes. Loratadine helps to block the action of histamine, thus relieving these symptoms. Decongestants like phenylephrine hydrochloride work by narrowing blood vessels in the nasal passages, reducing swelling and congestion. This can help alleviate sinus pressure and nasal congestion associated with hayfever and sinusitis. These active ingredients work synergistically to provide relief from the various symptoms of hayfever and sinusitis, making Maxiclear Hayfever & Sinus Relief tablets a popular choice for individuals seeking over-the-counter relief from these conditions.