Tapentadol 100mg tablet is a prescription medication used to treat moderate to severe pain. It belongs to the class of drugs called opioid analgesics and works by binding to certain receptors in the brain and spinal cord to decrease the sensation of pain. The tablet is usually taken orally every 4-6 hours as needed for pain relief. It should not be taken in larger amounts or for longer than prescribed as it can lead to addiction, overdose, or death. Common side effects of Tapentadol 100mg tablet include dizziness, drowsiness, nausea, vomiting, constipation, and headache. It is important to avoid alcohol and other sedatives while taking this medication as it can increase the risk of side effects.