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 may interact with digoxin, theophylline, blood thinners, or beta-blockers. Tell your doctor all medications and supplements you use. Propylthiouracil should be used only when prescribed during the first 3 months of pregnancy. It is not recommended for use during the last 6 months of pregnancy. If you are planning pregnancy, become pregnant, or think you may be pregnant, contact your doctor.