Opioid drugs are effective pain-relieving medication used to manage moderate or severe pain particularly after injury, surgery or chronic illnesses like cancer. They act by binding opioid receptors within the spinal cord and brain which reduces the feeling of the sensation of pain. Opioids that are commonly prescribed include morphine hydrocodone and oxycodone as well as Fentanyl. Though they're effective, they pose substantial risks that include constipation, dizziness, drowsiness as well as dependence, tolerance and dependence. Due to these dangers the majority of opioids are given at the most effective dosage and for the shortest period of time that is possible. The long-term usage of opioids requires medical supervision. Alternatives are usually explored to treat discomfort more effectively and safely.