How do I get ready for blood work or a fasting test?
Check whether your test needs a fast and get your own instructions.
For a blood test, fasting means no food or drinks except plain water for a set time. Not all blood tests need a fast.
Your care team must tell you if you need to fast, for how long, and what to do about medicines or supplements. Do not stop a medicine on your own.
A general guide or AI reply cannot set your test rules. Surgery or another procedure may have different rules for food and drink.
- Read the instructions from the team that ordered the test.
- If no fasting plan is given, ask before you fast.
- Ask what you may drink and which medicines to take.
- Check any other steps, such as limits on gum or exercise.
- Tell the team if you ate or drank during a required fast.
Write a short question for my clinic asking whether my blood test needs a fast, for how long, and what to do about my medicines. Do not supply the answers.
Paste the message into ChatGPT, then fill in any blanks before you send it. ChatGPT opens in a new tab. Opening it does not send the message.
Ask ahead of the test. If the instructions conflict, call the care team to clear them up.
Sources and more help
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