Thyroid Suppression Before Surgery: Medications and Procedures

Prior to thyroid surgery, the gland is often suppressed to reduce vascularity and intraoperative bleeding. Two main approaches are used:

Antithyroid Medications

• Methimazole (preferred) or Propylthiouracil (PTU): Inhibit thyroid hormone synthesis. Typically started 4–6 weeks preoperatively.

Radioactive Iodine (RAI)

Used less commonly for preoperative preparation, primarily in Graves' disease to ablate thyroid tissue. Requires isolation precautions.

Adjunctive Therapy

Beta-blockers (e.g., propranolol) may be added to control adrenergic symptoms. Iodine solutions (Lugol's) are sometimes given 1–2 weeks before surgery to further decrease gland vascularity.

Management is individualized based on diagnosis, hormone levels, and surgical urgency.