Hi Tonio, how are you feeling generally? Do you have any history of Type 2 diabetes in your family? Given your description of how your diagnosis came about I am wondering if you may actually be a slow-onset Type 1. Although around 20% of people with Type 2 are not overweight at diagnosis, which is a significant proportion, it's unusual to be losing weight. How long has the weight loss been going on?
As you are on gliclizide your GP should have issued you with a blood glucose monitor and a prescription for test strips. Gliclizide prompts your pancreas to produce more insulin and this can sometimes lead to low blood sugar levels which then need to be trated with some fast-acting sugar e.g. a couple of jelly babies of similar. Because of this you should always test your levels before driving to ensure you are at a safe level. If you weren't given a monitor, explain this to the GP and insist on one.
Using the monitor you will also be able to assess the impact of your food choices on your blood sugar levels, as described in
Test,Review, Adjust by Alan S. What is your appetite like? The problem is that, if you haven't been diagnosed correctly then 'bulking up' may not produce the results you are seeking i.e. gain weight. A slow-onset Type 1 will have a reduced supply of insulin and this means your body will not be able to use and store the energy from your food and you may continue to lose weight. I would add that a number of our members have been misdiagnosed as Type 2 and this can mean that you are placed on an unsuitable medication regime. A lot of healthcare professionals have little knowledge of Type 1 diabetes generally, but particularly when it appears in adulthood, so I would suggest asking the GP if there is a possibility of this - there are tests available that can help identify it.
For now, I would try to follow your normal diet and wait to see if the medication has its desired effect rather than making any drastic alterations to your eating patterns, as this may only cloud the waters.