Fasting
8–10 hours of fasting is required. Plain water is allowed.
Sleep & alcohol
At least 6 hours of sleep the night before. No alcohol for 24 hours prior.
Medications
Blood pressure medication can be taken as prescribed. Diabetic medication or insulin should be taken immediately after the fasting sample, not before.
Samples & scans
Urine and stool samples should be the first of the day. For a pelvic ultrasound, avoid urinating for an hour beforehand.
For women
Avoid scheduling during your period, especially for PAP smear and mammogram. If pregnant, avoid X-rays and mammograms.