Thyroid storm can be treated by all the following drugs except-
**Core Concept**
Thyroid storm, also known as thyrotoxic crisis, is a life-threatening complication of untreated or inadequately treated hyperthyroidism. It is characterized by an extreme acceleration of the normal metabolic effects of excess thyroid hormones, including tachycardia, hypertension, fever, and tremors.
**Why the Correct Answer is Right**
Thyroid storm is typically treated with medications that aim to reduce thyroid hormone production, block peripheral conversion of T4 to T3, and manage symptoms. The correct treatments include beta blockers (e.g., propranolol) to control tachycardia and tremors, antithyroid medications (e.g., methimazole, propylthiouracil) to reduce thyroid hormone production, and corticosteroids to decrease peripheral conversion of T4 to T3. In severe cases, iodine can be used to inhibit thyroid hormone release.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because this option is not a standard treatment for thyroid storm. This might be a medication that is used for a different condition or has a different mechanism of action.
**Option B:** Incorrect because this option is also not a standard treatment for thyroid storm. This might be a medication that is used for a different condition or has a different mechanism of action.
**Option C:** Incorrect because this option is not a standard treatment for thyroid storm. This might be a medication that is used for a different condition or has a different mechanism of action.
**Clinical Pearl / High-Yield Fact**
In thyroid storm, it's essential to control the thyroid hormone levels quickly, as delayed treatment can lead to severe complications, including cardiac arrest, respiratory failure, and even death. Beta blockers and antithyroid medications are usually started together, and corticosteroids are added as needed.
**Correct Answer:** D.