question: I was having severe pain in my buttocks & left leg along with numbness in legs while walking continuously for even 100 metres since August 2013. After a few rounds of medication, in October 2013, Doctor got MRI done & found slipped disc in L4-L5  & L5-S1. I got 5 physiotherapy sessions after this. I have been taking Nervax 75 twice daily, Xefo 8mg twice daily & Sirdalud 2mg once daily from November 2013. I exercise now & pain has reduced substantially. Doctor has stooped Nervax & Xefo since yesterday(29 Dec 2013), while continuing Sirdalud 4mg once daily. Today, again I'm feeling some pain in my buttock & a little numbness in my leg. Is surgery only option left after this medication for 4 months?If yes, how safe is it?