Hello and thanks for reading. I have a friend who is diabetic, haven't know him for that long. since I know nothing about Diabetes, I don't know what kind of Diabetes he has. He is older say 60 years of age and told me that he injects medication twice a day, for some reason I think its by injection. He went on holiday for about a month and has gained about 10kg since i saw him before he left. The other day he started our conversation by telling me that he has a headache, because of his new medication, his mood seemed fine although he wasnt very committing with his words regarding our previous plans. He seemed a little distracted and then all of a sudden came on to me verbally. I am just wondering could this be to do with side effects of the medication or sugar levels or the like? I am very upset by his behavior, we have been good friends, he had never even looked at be below the eyes before.. I just don't know what to think about this. Any ideas?