Serum/plasma concentration of citalopram (selective serotonin reuptake inhibitor)

Why This Test Is Done

Your healthcare provider may order this test if you’re taking citalopram regularly to check if your dose is working well in your body. It can help ensure you’re neither too low in medication (which may not help your symptoms) nor too high (which could cause side effects).

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your arm or vein to draw blood. It usually takes a few minutes. If you’re taking this test for monitoring, your provider may ask about recent changes in your medication or symptoms.

What the Results Mean

Results are compared to a general range for healthy individuals on citalopram, but your specific range may vary based on your dose, metabolism, and health. Low levels might mean your body isn’t absorbing enough medication, while very high levels could signal potential toxicity. Your provider will interpret the results in the context of your treatment plan.

Common Reasons for Testing

This test is often done during routine follow-ups to adjust medication doses, especially if you’re experiencing side effects or symptoms aren’t improving. It can also be used to confirm compliance with your treatment plan or assess how your body processes the drug.