Opioids + Gabapentinoids
Opioids + Gabapentinoids (pregabalin/gabapentin): the short answerPregabalin and gabapentin make opioid breathing suppression significantly worse — the FDA has warned this combination can cause fatal respiratory depression. Treat any unresponsiveness as an overdose: naloxone plus emergency services.
Why it’s dangerous
Gabapentinoids calm nerve signaling by binding calcium channels, and on their own they mildly depress the central nervous system. Combined with opioids they add to the suppression of the brainstem breathing drive, and studies link co-prescription to a substantially higher rate of fatal overdose. Because these drugs are widely prescribed for pain and anxiety, many people combine them without realizing the risk.
What happens
- Heavy sedation, dizziness, and loss of coordination
- Slowed breathing that can progress to respiratory arrest
- Confusion and memory gaps
- Increased overdose risk even at prescribed doses of both
Warning signs
- Unusual difficulty waking the person
- Breathing that is slow, shallow, or stops and starts
- Slurred speech, extreme unsteadiness, or glassy eyes
What to do
- Call emergency services and give naloxone if opioids may be involved
- Use the recovery position and stay with the person
- If you are prescribed both, tell your prescriber about the FDA respiratory-depression warning
- Do not take extra pregabalin/gabapentin to boost an opioid high — the margin is much smaller than it feels
- If you use anyway: never alone, start with only one substance, and keep naloxone nearby