Tapal-ER-100 tablet (Tapentadol) is a strong prescription pain-relieving medicine (opioid analgesic) used to treat moderate to severe pain when simpler painkillers are not effective. It is often used for long-lasting pain conditions such as pain after surgery, serious injury, arthritis-related pain, or certain nerve-related conditions. The medicine works by acting on the brain and spinal cord to reduce how the body feels and responds to pain. This is an extended-release tablet, which means the medicine is released slowly in the body and provides relief for a longer period, rather than acting for a short duration. Alcohol should be avoided while taking this medication, as it may increase side effects such as drowsiness and dizziness. This medicine can lead to dependence if used for a long time, so it must be taken only under strict medical supervision and exactly as prescribed by your doctor.