Combining oxycodone and gabapentin significantly increases the risk of respiratory depression, a potentially life-threatening condition. This happens because both drugs depress the central nervous system, slowing breathing and potentially leading to coma or death. The effect is more pronounced than taking either drug alone. Monitor your breathing carefully when using this combination. Seek immediate medical attention if you experience slowed breathing or difficulty breathing.
Increased Sedation and Dizziness
Expect increased sedation and dizziness. The combined effect intensifies these side effects, making driving or operating machinery incredibly dangerous. Avoid such activities. This effect can persist even after reducing the dosage of one or both medications. It’s also critical to be mindful of falls, as both drugs can increase your risk significantly.
Other Potential Side Effects
Beyond respiratory depression and increased sedation, you may experience nausea, vomiting, constipation, and confusion. Gabapentin can cause weight gain, while oxycodone can cause a higher risk of opioid-related side effects such as itching. Report any new or worsening side effects to your doctor immediately. Be aware that a synergistic effect can happen where the combined impact exceeds the sum of each drug’s individual effects.
Dosage Adjustments
Your doctor should carefully manage your dosages of both medications. Never adjust your dosages independently. They may need to lower the doses of either or both drugs to mitigate the risks associated with this combination. Open communication with your doctor is paramount.


