Generic Tramadol comes under the category of opioid analgesic. This drug acts directly in the brain to relieve pain. Moreover Tramadol lessens the intensity of the pain by inhibiting to the neurotransmitter norepinephrine and adrenaline. These neurotransmitters are mainly responsible for controlling the sensation of the pain. Tramadol when taken orally get metabolized in the liver to its active form O-desmethyl tramadol which is responsible for lessening the intensity of the pain.