How to Prepare for Your Blood Test

Fasting, water, medicines and timing — a quick guide to getting the most accurate results from your sample.

Accurate results start before the needle. A little preparation avoids repeat tests and gives your doctor numbers they can rely on.

Fasting

Tests like fasting blood sugar and lipid profile need 10 to 12 hours without food. Plain water is fine and helps make the draw easier.

Medicines

Keep taking your regular medicines unless your doctor says otherwise, but tell the phlebotomist what you take. Thyroid medicine is usually taken after the sample.

Timing

Morning samples are best for most tests. Book an early home collection slot so you can eat breakfast soon after.