Other diabetes medications. Insulin-releasing tablets (e.g. sulphonylureas) often lead to weight gain. These include: Minodiab, Euglucon, Daonil, and Glibenclamide. Tablets like Avandia, Actos, Starlix and NovoNorm also encourage weight gain. But not Metformin. The newer drugs Victoza and Byetta (injectable) often lead to weight loss, but possible long-term side effects are still unknown. More on diabetes
Some people feel better supplementing the already active T3 (sometimes prepared from pig thyroid glands), as it can give a stronger effect than the T4 hormone, but its effect is often harder to control. Swedish healthcare rarely prescribes or offers such T3 treatment, as it often lacks advantages and may pose a risk when doses are high for an extended period of time.
Lastly, as I indicated, all my lifts are going up, but my weight (and even LBM, assuming my scale is even remotely accurate) so is it fair to say that strength gains are not directly related to muscle gains? Is this the “beginner” phase that you speak of frequently? The scale would indicate that muscle is going down….. But my presses, squats, deadlifts are all up.