Lorazepam and Morphine: Drug Interaction Guide
Quick answer: This is a major interaction — avoid combining Lorazepam and Morphine unless specifically directed by your doctor.
How Lorazepam interacts with Morphine
Both drugs depress central nervous system activity through opioid receptor activation and GABA-A enhancement, respectively. Additive respiratory depression, sedation, and overdose risk can occur.
What you should do
Avoid routine co-prescribing; if necessary, use the lowest effective doses, limit duration, counsel the patient, and monitor for sedation and respiratory depression.
Key facts
Severity
Major — avoid combination
Mechanism
Both drugs depress central nervous system activity through opioid receptor activation and GABA-A enhancement, respective...
Action
Avoid routine co-prescribing; if necessary, use the lowest effective doses, limit duration, counsel the patient, and mon...
Frequently asked questions
Can I take Lorazepam and Morphine together?
No — this combination should generally be avoided. Avoid routine co-prescribing; if necessary, use the lowest effective doses, limit duration, counsel the patient, and monitor for sedation and respiratory depression.
What is the severity of this interaction?
The interaction between Lorazepam and Morphine is classified as Major — avoid combination. Both drugs depress central nervous system activity through opioid receptor activation and GABA-A enhancement, respectively. Additive respiratory depression, sedation, and overdose risk can occur.
What should I do if I'm prescribed both?
Avoid routine co-prescribing; if necessary, use the lowest effective doses, limit duration, counsel the patient, and monitor for sedation and respiratory depression. Always consult your prescribing clinician — do not stop or change medications without medical guidance.
Last reviewed: by iMedic Medical Editorial Team. Our editorial process.