Beschreibung
Diphenhydramine, a sedating antihistamine, substantially increases CNS and respiratory depression when combined with opioids like oxycodone.
Mechanismus
Diphenhydramine blocks histamine H1 receptors and has significant anticholinergic and sedative activity; combined with opioid-mediated CNS depression, respiratory compromise is enhanced.
Klinische Bedeutung
Postmarketing case reports and FDA safety data highlight increased overdose risk; the combination is sometimes used illicitly for euphoria.
Maßnahmen
Avoid combination; use non-sedating antihistamines (loratadine, cetirizine) in patients receiving opioid therapy.
Medizinischer Haftungsausschluss
This content is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making medication decisions.