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Tramadol is a centrally acting opioid analgesic used to treat moderate to severe pain. The 100mg/2ml dosage form is an injectable preparation, often administered when rapid pain relief is required or when oral administration is not feasible. Tramadol acts by binding to specific receptors in the brain and spinal cord, inhibiting the reuptake of norepinephrine and serotonin, which modifies the pain perception. While effective, it can lead to side effects like dizziness, nausea, constipation, and sedation.