3d image of tramadol skeletal formula

tramadol opioid pain medication pain anesthesia analgesia analgesic relief anesthetic paracetamol acetaminophen opiate constipation itchiness nausea hallucinations seizures drug addiction suicide fibromyalgia opiate refractory restless legs syndrome rls physical dependence withdrawal serotonin–norepinephrine reuptake inhibitor snri serotonergic selective serotonin inhibitors tricyclic antidepressants triptans seizure drug side effect adverse action iatrogenic overdose contraindications interaction pharmaceutics pharmaceutical pharmacodynamics pharmacokinetics 3d