Diet Coke is not supposed to affect your blood sugar, but it may have different effects on different people. Personally, I use stevia- it doesn't mess up my blood sugar and it doesn't taste bad. But Coke doesn't use it.
I don't know your personal carb target number, but I know that in general if you eat protein with carbs they are digested better. Avoiding refined sugar in large amounts is generally helpful too, and that does include honey. I personally do best when I avoid grains and white potatoes but I know that isn't for everyone.
If you are newly using insulin it is imperative that your medical care provider provide you with a referral to a certified diabetes educator who can address this question with you. It is a complex question that needs to take your individual needs into consideration. They need to take your medical history and more into account.
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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