What Causes Tingling And Numbness In Hands During Morning?

Hi Dr. Grief , I am tapering off Lorazapan 1mg after a month use for a bout of anxiety for the first time in my life. I was also suffering from insomnia. I have tapered off as advised by reducing the dosage too .5mg missing a night and then .25mg. For the past 4 nights I have been sleeping reasonably well. The downside my blood pressure went up so my Dr. put me on Prendil 5mg-- to control the high b.p. in the mornings by mid morning the b.p. has dropped and by mid afternoon it is at an acceptable level 138/83. my question is I wake up with tingling and numbness in both arms and fingers but goes away soon after I wake up.. Is this associated with the nervous system because I am coming off the LORAZEPAN or more related to my new b.p. medication [been taking for 7 days.] I am a 67 year old male and reasonable fit.. Thanks ROGER BROWN.