Taking lorazepam with hydrocodone is dangerous and carries a risk of fatal overdose. The FDA has placed its strongest possible warning, a Boxed Warning, on both drug classes specifically because combining them can cause extreme sedation, slowed or stopped breathing, coma, and death. That said, some people are prescribed both medications under careful medical supervision, so the answer isn’t an absolute “never” but rather a serious “not without significant precautions.”
Why This Combination Is So Dangerous
Lorazepam is a benzodiazepine. Hydrocodone is an opioid. Both drugs slow down the central nervous system, but they do it through different pathways, and those pathways converge in a critical place: the brainstem centers that control your breathing.
Opioids like hydrocodone suppress breathing by acting on specific opioid receptors concentrated in the brain’s respiratory control centers. Lorazepam works on a different receptor system (GABA receptors), but those receptors are also highly concentrated in the same respiratory areas. When both drugs hit those overlapping regions at the same time, the effect on breathing isn’t just doubled. It becomes unpredictable and potentially overwhelming. Your breathing can slow to a dangerous rate or stop entirely, sometimes without you or anyone nearby realizing it’s happening because you’re deeply sedated.
The Numbers Behind the Risk
People who are co-prescribed opioids and benzodiazepines die of overdose at 10 times the rate of people prescribed opioids alone. A large case-cohort study found that having concurrent prescriptions for both drug classes nearly quadrupled the risk of overdose death compared to an opioid prescription by itself. Benzodiazepines show up in the toxicology reports of a large proportion of opioid-related overdose deaths.
These statistics drove the FDA to issue its 2016 safety communication requiring Boxed Warnings on every opioid pain medication, opioid cough medication, and benzodiazepine sold in the United States. The agency also required updated drug interaction information and patient medication guides for both classes.
When Doctors Prescribe Both Anyway
The CDC’s 2022 prescribing guideline acknowledges that there are situations where a patient might legitimately need both medications. For example, someone on a stable, low-dose benzodiazepine for a long-standing anxiety disorder might develop severe acute pain that requires an opioid. In these cases, the guideline calls for particular caution and careful weighing of benefits against risks.
The risk climbs higher in certain patterns of use. Taking higher doses of either medication, using them unpredictably rather than on a stable schedule, or adding alcohol or other sedating substances makes the combination substantially more dangerous. Conversely, long-term stable use of lower doses of both, without other substances in the mix, represents a lower (though still elevated) risk.
In palliative care settings, where patients with advanced cancer are already on opioid pain medication, clinicians sometimes add benzodiazepines for anxiety or agitation. A prospective study in end-stage cancer patients found that adding a clinical dose of a benzodiazepine to existing opioid therapy did not significantly increase respiratory depression beyond what the opioid alone was already causing. But this was in a monitored medical setting with patients whose care priorities are different from someone managing everyday pain or anxiety.
What an Overdose Looks Like
If you or someone you know is taking both medications, recognizing overdose symptoms can be lifesaving. The warning signs include:
- Very small, pinpoint pupils
- Slow, shallow breathing or choking and gurgling sounds
- Extreme drowsiness or inability to wake up
- Limp body
- Pale, blue, or cold skin, especially around the lips and fingernails
- Faint heartbeat
- Vomiting
One important thing to know: naloxone (sold as Narcan) can reverse the opioid component of an overdose but does nothing to reverse the effects of lorazepam. It works by blocking opioid receptors, so it will counteract the hydrocodone but not the benzodiazepine. This means that even after naloxone is administered, the person may still be dangerously sedated from the lorazepam. Naloxone should still be given, as reversing even one of the two drugs can be enough to restore breathing, but the person needs emergency medical attention regardless.
How the Drugs Interact Metabolically
Beyond the additive effect on the brain, there is a potential metabolic interaction. Hydrocodone is broken down primarily by liver enzymes (CYP2D6 and CYP3A4). Lorazepam is processed through a different pathway called glucuronidation, so the two drugs don’t directly compete for the same breakdown enzymes. However, lorazepam has been shown in lab studies to inhibit UGT2B7, an enzyme involved in processing some opioid metabolites. The practical significance of this is uncertain, but it raises the possibility that lorazepam could subtly alter how your body clears certain byproducts of hydrocodone.
Safer Options for Anxiety While on Hydrocodone
If you’re taking hydrocodone and need help managing anxiety or insomnia, several medication classes pose less risk than benzodiazepines. SSRIs and SNRIs are first-line treatments for generalized anxiety, panic disorder, and social anxiety disorder. Buspirone, which works on serotonin receptors rather than GABA receptors, is FDA-approved for anxiety and is commonly used alongside SSRIs or SNRIs. It does not cause the respiratory depression that benzodiazepines do.
Hydroxyzine, an antihistamine, is FDA-approved for anxiety and is frequently used as a benzodiazepine alternative in both inpatient and outpatient settings. It can cause drowsiness, but it doesn’t carry the same risk of fatal respiratory suppression when combined with opioids. Mirtazapine is another option that can help with both anxiety and sleep, has fewer drug interactions than many alternatives, and is generally considered safe for older adults.
If You’re Currently Taking Both
If you’ve been prescribed both lorazepam and hydrocodone by the same prescriber, they’ve presumably weighed the risks for your specific situation. The CDC guideline recommends that clinicians check prescription drug monitoring databases and involve pharmacists when co-prescribing these medications. You should avoid alcohol entirely while taking both, use the lowest effective doses, and make sure someone close to you knows the signs of overdose and has access to naloxone.
If you’re getting these prescriptions from different providers, each prescriber needs to know about the other medication. And if you’re considering stopping either drug, do not quit lorazepam abruptly. Sudden benzodiazepine withdrawal can cause seizures, hallucinations, and in rare cases, death. Any tapering should be gradual and medically supervised.