Autoimmune diseases raise the risk of heart disease, stroke, and blood clots
The short answer is yes, alcohol in moderation on a weight loss drug may be okay if your doctor says so (keep in mind that drinking carries health risks of its own)
Front Immunol 8:1734 Ellingsgaard H, Hauselmann I, Schuler B, Habib AM, Baggio LL, Meier DT, Eppler E, Bouzakri K, Wueest S, Muller YD, Hansen AMK, Reinecke M, Konrad D, Gassmann M, Reimann F, Halban PA, Gromada J, Drucker DJ, Gribble FM, Ehses JA, Donath MY (2011) Interleukin-6 enhances insulin secretion by increasing glucagon-like peptide-1 secretion from L cells and alpha cells
Conversely, studies have shown that weight loss can help to control blood glucose levels and may even reverse the development of type 2 diabetes [5]