Alcohol paralyzes your liver so it can't correct a low.The metformin prescribing information also warns against drinking while taking metformin. I would advise that you stay away from it when taking Met and Amaryl. That's a dangerous combo for many reasons.
Beyond that, Amaryl causes uncontrollable insulin secretion, regardless of what you eat and it will force you to eat carbs and cause weight gain. Worse, even when not causing lows it causes hunger.
Have you tried the approach described here: How to Lower Your Blood Sugar? . It works very well, and very safely for thousands of us, though If you try it, try it with only the metformin, not the Amaryl.