Symbicort precautions. Before using this medication, tell your doctor or pharmacist your medical history, especially of: current/past infections (such as tuberculosis, herpes), high blood pressure, heart disease (such as chest pain, heart attack, irregular heartbeat), overactive thyroid (hyperthyroidism), seizures, bone loss (osteoporosis), eye problems (such as cataracts, glaucoma), diabetes, liver disease, swelling of an artery (aneurysm), a certain tumor of the adrenal gland (pheochromocytoma).