Which tube is used for therapeutic drug level testing and contains no additive?

Which tube is used for therapeutic drug level testing and contains no additive?

• A. Red Tube — No additive
• B. SST — Gel barrier
• C. Lt Blue Tube — Na Citrate
• D. Gray Tube — Na Fluoride/K Oxalate

Answer: (A)

For therapeutic drug level testing, you want a sample that isn’t altered by additives. A red top tube contains no additive, so the blood can clot and you obtain serum without any anticoagulants or gels that might interfere with drug measurements. This minimizes potential interactions or adsorption that could skew results, which is crucial for accurately monitoring drug levels. The other tubes include substances such as a gel barrier, clot activator, citrate, or fluoride/oxalate, all of which can interfere with certain drug assays or dilute the sample, leading to less reliable results. Therefore, the no-additive red tube is the best choice for this testing.

For therapeutic drug level testing, you want a sample that isn’t altered by additives. A red top tube contains no additive, so the blood can clot and you obtain serum without any anticoagulants or gels that might interfere with drug measurements. This minimizes potential interactions or adsorption that could skew results, which is crucial for accurately monitoring drug levels. The other tubes include substances such as a gel barrier, clot activator, citrate, or fluoride/oxalate, all of which can interfere with certain drug assays or dilute the sample, leading to less reliable results. Therefore, the no-additive red tube is the best choice for this testing.