Slip disc issue. Left for my dad?

My father's age is 51 He has been diagnosed with slip disc (between L4 and L5) I have attached the MRI reports He is having unbearable pain that starts from lower back n goes till left leg He is not able to sit even for 10 sec tingling and pain starts We have shown one spine surgeon He told us to take meds for 3 week n if condition doens't improve then proceeds to surgery He has given Ultracet Pan - D Gaba neuron (NT 400/10) Even taking for 10+ days there is no major improvement We have shown to 2nd doctor for second opinion as it is feeling so much risky for operation And 2nd doctor said don't take so much meds And he told to take meds for 6days and stop the previous med He prescribed DFZ 6mg If no improvement then have to do surgery So now i m confused wht should I do and whom should I consult Is surgery is the only solution left for my dad? He is having high blood pressure, diabetes and taking meds of that too Whom should I consult i want assurance and more discussion