sedation
"I can't say this drug has NO effect, but I'm a chronic insomniac and have been treated for it with Xanax or Klonopin for at least the last 20 years.  While mild doses of those drugs have induced sleep, when I've desired more sleep than those "benzos" have allowed me, I've tried Promethazine in varied doses, from 12.5 to 75 MGs and it just doesn't induce sleep like I had hoped.  It's very effective for reduction of nausea, but I'm lucky if it barely makes me drowsy.  Sometimes, even the higher doses had no effect at all. BOTTOM LINE: This med gets great reviews, so it works for some, but I'm proof that it's not effective for EVERYONE."