Slipped disc. Surgery is reqd or not.

I hv been suffering from slipped disc and I also consulted with the doctors at Nimhans hospital, Bangalore, India and the doctor examined that the L4-5 disc gas displaced and give pressure to the spinal cord making it thinner at the affected area. The doctor had prescribed me medicines -Maxgalip AT and Pantop 40 and advised me to take the medicines fir 2 months,.. I have been regularly taking the medicines but i hv not seen any sign of progress, rather my condition is worsening day by day... I feel shock like sensation  in my right leg, less strenght, can't walk properly, can't sit, stand, sleep for much time continuously... So, I would like to hv the best solutiin of my problem and i would also like to ask whether surgery is reqd or not....