Suggest Treatment For Lower Waist Pain

I am 40 yr old man suffering from severe pain in lower waist to knee since last 10 days. The pain is on higher side since last four days. Before this I was suffering from waist pain since last two months. The waist pain is almost disturbed me once a year for three to four day. After consultation with a doctor de diagonised it as Scitica . Kindly advice me about the medicines to relief from servere pain as well as to recover from the above problem. One thing more the pain is on higher side at morning.