What Are Of Side Effects Of Taking Norvasc Instead Of Cyclobenzaprine?

I accidentally took my husbands norvasc 5 today. I thought I was taking my cyclobenzaprine10. This wS 8 hrs ago. I do not have high blood pressure, my blood pressure usually runs below normal. 90/60. Should I take my cyclobenzaprine now, it has been 8hrs and I really need it for neck injury.