Hi...Dr. Changed My Med Lisinopril From 20 To 40 Mg

Hi...Dr. changed my med Lisinopril from 20 to 40 mg April 1st due to high b/p spike in the middle of the night with headache. All test done normal. I have been on 20 for years with results. H/B/P for years also been on metrpopril. 25 since 2003. increase med back to normal. Recently 3 wks.. I have had scatica or that which i think is scatica on left back leg out of blue? Could this be related to increase Lisinopril?