Quote:
Individuals who use insulin, inject other antidiabetes drugs, or take oral medications to control diabetes should avoid using melatonin because it can block the use of insulin, possibly changing blood sugar levels unpredictably. Hypoglycemia (blood sugar that is too low) or hyperglycemia (blood sugar that is too high) may result. Melatonin supplements should be avoided by individuals who inject insulin or other drugs (such as Byetta, Symlin, or Victoza), or take oral drugs for diabetes, such as:
acarbose
Actos
Avandia
glimepiride
glipizide
glyburide
Glyset
Januvia
metformin
Onglyza
Prandin