"i use ambien cr 12.5mg (strongest), and i still wake up at 3am.  can&#039;t take another ambien. to avoid any risk associated with driving to work and then dealing with the drowsiness while at work, my doctor put me on sonata.  even if i wake up at 3 or 4, i am able to enjoy the rest of my night in restful sleep with no morning drowsiness at all.  "