Types of Bronchitis. Acute infectious bronchitis commonly accompanies or follows a URI; it develops over a couple of days, produces symptoms for 3 to 7 days, and resolves to a cough before normal respiratory function is recovered. Acute irritative bronchitis is triggered by allergies and chemical and other types of environmental irritants.
Reserve propylthiouracil use for those unable to tolerate other treatments (eg, methimazole, radioactive iodine, surgery) Propylthiouracil may be the treatment of choice during and just before the first trimester of pregnancy (strong association of methimazole with congenital malformation during first trimester)
Propylthiouracil is also given to people in preparation for surgical removal of the thyroid gland and prevents a complication known as thyroid storm, in which large amounts of thyroid hormone are released into the bloodstream.