A full agonist is a type of drug or compound that binds to a specific receptor in the body and activates it to produce a maximum biological response. This means that when a full agonist attaches to a receptor, it triggers the highest level of activity possible, leading to a strong effect. Full agonists are often used in various medical treatments to achieve desired outcomes. In contrast to partial agonists, which activate receptors but produce a weaker response, full agonists provide a more robust effect. Common examples of full agonists include certain opioids, such as morphine, which effectively relieve pain by fully activating opioid receptors in the brain.