Tramadol is an opioid analgesic that alleviates pain by inhibiting the transmission of pain signals to the brain, thereby reducing the perception of pain. Domperidone is a prokinetic medication that targets the brain region responsible for controlling vomiting. It enhances the movement of the stomach and intestines, facilitating the easier passage of food through the digestive system. Paracetamol is an analgesic, or pain reliever, as well as an antipyretic, or fever reducer. It works by blocking the release of specific chemical messengers that trigger fever and pain.