Study to evaluate the efficacy and safety of the fixed-dose combination of Pregabalin/Tramadol versus Pregabalin in the management of acute pain of neuropathic origin. Patients who meet the inclusion criteria of the protocol and start treatment with the combination Pregabalin / Tramadol (75 mg / 50 mg) or Pregabalin 75 mg will be included. To evaluate the proportion of subjects who reported a success rate in the reduction of pain by 50%, the percentage of change in the pain intensity reported through the Visual Analog Pain Scale (VAS) will be calculated. This percentage will be categorized and the proportion of patients per treatment group will quantify. Changes in pain intensity during the intervention will be evaluated with the fixed-dose combination of Pregabalin/Tramadol (75 mg / 50 mg) or Pregabalin 75 mg, comparing the average difference in pain reported through VAS at days 1, 3, 5, 7, 10, 13 and 15 with respect to their baseline measurement. The mean change in reported neuropathic pain intensity across the DN4 questionnaire will also be evaluated, comparing its measurement on day 3, 10 and 15 with respect to the baseline, in each treatment group.~At visit 1 (day 3) the need for dose escalation will be evaluated (Pregabalin/Tramadol (150 mg / 50 mg) or pregabalin (150 mg)) in both treatment groups, continuing with its follow-up in the evaluation of the intensity of pain reported by EVA and DN4. The proportion of subjects who started on the dose of Pregabalin / Tramadol (75 mg / 50 mg) or Pregabalin 75 mg, those that required adjustment of dose to treatment (Pregabalin / Tramadol (150 mg / 50 mg) or Pregabalin (75 mg)), as well as the proportion of patients who suspended the treatment.~The percentage of adherence to the intervention by treatment group will be reported.~The proportion of adverse events presented during the conduct of the study will be evaluated, regardless of the dose administered, to all the subjects who have received at least one dose of the investigational drug Which will be reported be reported through frequencies and percentages and classified according to frequency, gravity, severity (intensity) and the causality of the clinical manifestation.
Phase IIIb confirmatory study of efficacy and safety, longitudinal, multicenter, randomized, double-blind study of the combination Pregabalin/Tramadol versus Pregabalin in the management of acute pain of neuropathic origin.