Side effects of generic Decadron drug may include abdominal distention, allergic reactions, blood clots, bone fractures and degeneration, bruises, cataracts, congestive heart failure, convulsions, "cushingoid" symptoms, excessive hairiness, fluid and salt retention, general feeling of illness, glaucoma, headache, hiccups, high blood pressure, high blood sugar, hives, increased appetite, increased eye pressure, increased pressure in head, increased sweating, increases in amounts of insulin or hypoglycemic medications needed in diabetes, inflammation of the esophagus, inflammation of the pancreas, irregular menstruation, loss of muscle mass, low potassium levels in blood, muscle weakness, nausea, osteoporosis, peptic ulcer, perforated small and large bowel, poor healing of wounds, protruding eyeballs, suppression of growth in children, thin skin, tiny red or purplish spots on the skin, torn tendons, vertigo, weight gain.