**17. Contraindications**

The use of 131I in pregnant or lactating patients is contraindicated. Women or men who intend to have children within the next 6 months are also advised not to be given radioactive iodine. However, there is insufficient evidence of the risk of teratogenicity with radioiodine. Other equivalent contraindications are: severe inflectional ophthalmopathy and patient refusal [3, 14, 57, 66].
