Alleviatives are agents used to reduce or ease pain, discomfort or distress. There are several synonyms for this term, including analgesics, palliatives, sedatives and tranquilizers. Analgesics are drugs or substances that reduce pain, such as aspirin and ibuprofen. Palliatives are treatments used to relieve symptoms of a disease, but not to cure it, such as radiation therapy for cancer. Sedatives are substances that calm and relax, often used to treat anxiety or insomnia. Tranquilizers are drugs that calm nervous tension and reduce anxiety, such as benzodiazepines. All of these terms refer to substances or treatments that help alleviate physical or emotional discomfort, and are commonly used in healthcare and medicine.