Urinary gabapentin concentration (24-hour collection)

Why This Test Is Done

Your healthcare provider may order this test if you’re taking gabapentin to manage nerve pain or seizures. They might also use it to monitor how well your body is handling the medication, especially if you have kidney issues or are taking other drugs that could affect gabapentin levels. It can also help determine if you’re properly absorbing or eliminating the medication.

What to Expect Before the Test

You’ll need to collect all urine for a full 24-hour period. Start by emptying your bladder at the beginning of the collection period (e.g., midnight). Then, collect every bit of urine you pass for the next 24 hours, including the first urine of the next day. Store the urine in a clean container and keep it refrigerated until you return it to the lab. Follow your provider’s specific instructions carefully to ensure accurate results.

What to Expect During the Test

No special preparation is needed beyond the 24-hour urine collection. The lab will analyze the sample to measure gabapentin levels. You’ll likely receive a report with the results within a few days.

What the Results Mean

Results help determine if your gabapentin levels are within the expected range for your dose and health status. Abnormally high or low levels might indicate issues like improper absorption, kidney problems, or interactions with other medications. Your provider will discuss these results with you during your follow-up.