How to Prepare for a Blood Test: Fasting, Water and Medicines
Fasting, water, morning timing and medicines are the four things that most often change a result.
Fasting
Sugar and lipid tests usually need 8–12 hours without food. Water is usually allowed — confirm with your lab, because rules differ by test.
Medicines
Do not stop regular medicines unless your doctor or lab tells you to. Tell the lab what you take, including supplements.
Timing and practical tips
- Book morning slots for fasting tests.
- Drink water, unless told otherwise — it makes blood collection easier.
- Carry your Aayush Health Card and ID, and confirm the member charge before testing.
- Avoid alcohol the day before, and avoid heavy exercise just before the test.
If you are unsure about any instruction, call the lab before you go. A wrong preparation can mean a repeat visit.
Disclaimer: This article is general health information only, not medical advice. Consult a doctor for personal health decisions, symptoms, or test results.
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