It really depends on what kind of drugs you are taking.
Most of them will affect your liver so won't have much effect on your blood sugar levels.
You don't say what your blood sugars have been running, either.
You should be alright, but why are you taking these unprescribed drugs anyway?
First, with or without diabetes, taking drugs which you don't really need is very dangerous---I think you already know that. Second, as a diabetic, you are prescribed with medications and these drugs have contraindications and adverse interactions with other substance. It is possible that the other pills you pop would adversely interact with you diabetic medications.
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