Final answer:
Hypoglycemia is not a common side effect of medications for endocrine diseases, especially considering the effects of thyroid dysfunction such as hyperthyroidism and hypothyroidism, which do not typically result in low blood sugar levels.
Step-by-step explanation:
The subject of the question is to identify which side effect is NOT common in medications for endocrine diseases. The common side effects mentioned in the question include weight gain, hypertension, mood changes, and hypoglycemia. However, according to the details provided, hypothyroidism generally results in weight gain, cold sensitivity, and reduced mental activity, while hyperthyroidism leads to weight loss, profuse sweating, and an increased heart rate. From this information, it can be determined that hypoglycemia (low blood sugar) is not a typical side effect of medications for endocrine disorders, at least not for the conditions described (hypothyroidism and hyperthyroidism). Instead, hyperthyroidism can sometimes cause hyperglycemia, not hypoglycemia.