Before you start asthma treatment with Symbicort, warnings and precautions for the drug should be fully understood. Several side effects are possible with Symbicort, including worsening breathing problems, rapid heart rate, high blood pressure, infection, and irregular heart rhythm. Symbicort warnings and precautions also extend to those who are allergic to any components used to make the medication.
Not had chickenpox or the measles (or have not been vaccinated against them)
Any allergies, including allergies to food (especially milk), dyes, or preservatives.
Also, let your healthcare provider know if you are:
Pregnant or thinking of becoming pregnant
Breastfeeding.
Make sure to tell your healthcare provider about all other medicines you are currently taking, including prescription and non-prescription medicines, vitamins, and herbal supplements.