Final answer:
Taking an extra dose of levothyroxine can lead to hyperthyroidism in a client with hypothyroidism. Symptoms such as weight loss, sweating, increased heart rate, and difficulty sleeping indicate the need for a thyroid function panel.
Step-by-step explanation:
When a client with hypothyroidism and hypertension takes an extra dose of levothyroxine, it can lead to hyperthyroidism, which is the opposite of their hypothyroidism condition. Hyperthyroidism can cause symptoms such as weight loss, profuse sweating, increased heart rate, and difficulty sleeping. Therefore, if a client with hypothyroidism and hypertension reports experiencing these symptoms after taking an extra dose of levothyroxine, it indicates the need to obtain a thyroid function panel to assess their thyroid hormone levels.