Blood Test Prep

Check appointment time and location

Confirm lab name, address, and whether walk-ins are allowed.

Confirm fasting requirements for your specific test

Ask your GP or lab how many hours to fast; tests vary (8–12 hrs common).

Ask whether plain water is allowed during fasting

Most tests permit water; staying hydrated often helps the draw.

Confirm exact fasting window length for your test

Write down start and end times so you stop eating at the right moment.

Check with your GP or pharmacist before pausing medications

Do not stop prescribed meds without medical approval; some affect results.

Prepare a clear list of current medicines and supplements

Include dosages and timing to give to the lab or GP.

Stay well hydrated before the appointment (if allowed)

Drinking water makes veins easier to find and reduces failed draws.

Avoid alcohol and strenuous exercise 24 hours before

Both can change some lab values and affect results.

Wear short sleeves or loose clothing for easy arm access

Roll up sleeves comfortably; bring a jacket if you need warmth after.

Bring photo ID, insurance card, and any lab forms

Have appointment confirmation or referral ready to speed check-in.

Bring a small snack and water for after the draw

Use after the test if fasting is complete; helps prevent lightheadedness.

Warm your hands or run warm water briefly to dilate veins

Warmth improves vein visibility and can make the draw easier.

Tell the phlebotomist about past fainting or difficult draws

They can use special techniques, have you sit/lie down, or use smaller needles.

Ask how and when you will receive your results

Confirm whether results go to your GP, an online portal, or by phone.