Just make sure they know exactly what sedation you've had, the dose, and time you took it. We don't make people fast either but still like to know when they last ate.

For your medications, anything that interfers with clotting should be stopped including aspirin unless there is a specific reason you can't (such as heart valve issues). They may not want you to alter your meds so they can see exactly what is happening and if it's because of your meds. Stopping them now would give a false result if that makes sense.

You will need to avoid heavy lifting. Again, it depends on the protocols of the venue but we say 72 hours.

Often they say "several hours" to account for if there are any set backs. For example, if you had pain that couldn't be controlled, you'd need to stay longer. You'd be surprised how many people go "I was told 3 hours and it's been 3 hours - I'm going!" when they are in no condition to leave!

The biopsy will reveal more than the bloods and they can also test for things bloods don't reveal.

Is there anything in particular you're worried about for the test? They will put local anesthetic into the site first so you shouldn't feel anything other than pressure.