Receptor blockers are medications that inhibit the action of specific receptors in the body. These receptors are proteins on cell surfaces that bind to signaling molecules, such as hormones or neurotransmitters, to trigger various physiological responses. By blocking these receptors, the medications can reduce or prevent the effects of these signaling molecules, which can be beneficial in treating various conditions. Common types of receptor blockers include beta-blockers, which are used to manage heart conditions, and antihistamines, which help alleviate allergy symptoms. By interfering with receptor activity, these drugs can help control symptoms and improve overall health outcomes for patients.