@charlie000
You asked about the oral glucose tolerance test (OGTT) which is when you drink 75g of pure glucose whilst in a fasted state. This page on our website explains the test.
https://www.diabetes.co.uk/oral-glucose-tolerance-test.html
It can be done at home, but requires a morning where you have nothing else to do but sit down, read, and test yourself every 15 minutes for uop to 3 hours. You can buy ready made glucose, made especially for this test. Some doctors use this.
https://www.gpsupplies.com/catalog/...pilose-ogtt-glucose-solution-300ml-pack-of-1/
However, in the instructions for preparation for this test, you need to be on a stable diet, you need to be at a constant weight with no acute illness, and need to maintain an adequate carbohydrate intake of at leat 130g a day for 3 days prior to the test. You need to have fasted for 9 hours with nothing but water (no food, no medications, no caffeine, no tobacco)
Other factors can weaken the results of the test including certain drugs. Beta Blockers are one of these "certain drugs"
I am 100% certain this test is not appropriate for you.