The goal of this clinical trial is to compare different combinations of diclofenac with diclofenac monotherapy in acute sciatica. The main questions it aims to answer are: * Does the combination of diclofenac plus codeine better than diclofenac monotherapy for treating severe pain of sciatica * Does the combination of diclofenac plus lacosamide better than diclofenac monotherapy for treating severe pain of sciatica Participants will be asked to mark their pain intensity on a visual analog scale and fill oswestry disabilit index questionnaire,treatments they'll be given includes either 1. Diclofenac monotherapy 2. Diclofenac plus codeine 3. Diclofenac plus lacosamide Researchers will compare the above three groups to see if severity of pain and disability lowered after medication
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Pain Intensity
Timeframe: Patients were asked to mark a line and record their pain scores at baseline and day 5, day 10 and day 15