<unk> (nasal) is a opiod analgesic that is FDA approved for the treatment of breakthrough pain in cancer breakthrough pain in cancer,. There is a Black Box Warning for this drug as shown here.  Common adverse reactions include application site reaction, diaphoresis, pruritus, abdominal pain (transdermal, 3% to 10% ; sublingual, 1% or greater ), constipation (adults, , diarrhea, indigestion (transdermal, loss of appetite, nausea, vomiting, xerostomia, asthenia, confusion , dizziness, feeling nervous, headache, insomnia, somnolence, psychiatric: Anxiety, depression, euphoria, hallucinations, upper respiratory infection , influenza-like symptoms.
Fentanyl 
Remifentanil
Ketamine
Alfentanil
Propofol
Etomidate
Sevoflurane
Mirfentanil