Clinical Trial Screening Tips: How to Prepare and Improve Your Eligibility
Follow these essential clinical trial screening tips to increase your chances of qualifying. Learn how to prepare for a clinical trial screening the right way.
1. Avoid THC Products Before Your Screening
Do not schedule a screening visit if you have consumed products containing THC within the past 3 to 4 weeks. A positive drug test will disqualify you and disqualify you from receiving compensation for your time or travel.
Tip: Consider purchasing an over-the-counter urine drug test to check yourself in advance.
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2. Avoid Intense Exercise 24–48 Hours Before
Avoid strenuous workouts for at least a day or two before your screening. Exercise can temporarily affect:
Enzyme levels
White blood cell counts
Hydration status
These changes may impact your lab results and could lead to misinterpretation or disqualification from the study.
Tip: Stick to light activities like walking or stretching to maintain your baseline health.
3. Know Your BMI in Advance
Most studies require your Body Mass Index (BMI) to fall within a specific range, usually 19–30 or 18–32. If your BMI is outside the allowed range, you won’t qualify.
Tip: Weigh yourself at home or at a pharmacy and use a BMI calculator before scheduling your visit.
4. Disclose Your Full Medical History and Medication Intake
Be completely honest about your:
Medical conditions
Prescription medications
Supplements and vitamins
Inaccurate or incomplete information could disqualify you or pose risks to your health during the study.
Tip: Write down your medications and conditions in advance so you don’t forget anything during your screening.
5. Arrive on Time and Fasted
Arriving late may disqualify you. You’ll also need to fast (no food or drinks except water) for at least 8 hours before your screening, as this affects blood test accuracy.
Tip: Set a reminder to fast the night before and plan to arrive 10–15 minutes early.
6. Bring Valid ID and SS Documents
You must bring:
A valid State ID
Your Social Security Card or IRS document showing your ITIN
Without these, you may not be screened or compensated.
Tip: Double-check that you have both documents in your wallet or bag before leaving for your appointment.
