Some precautions and warnings with salmeterol include potential drug interactions, the safety of taking salmeterol while pregnant, and an increased risk of side effects in some people who take this medicine. A few of the conditions you should let your healthcare provider know about before you take salmeterol include diabetes, high blood pressure, and seizures or epilepsy. To reduce the chances of drug interactions, you should also tell your healthcare provider (prior to taking salmeterol) about all other drugs you are taking. Among the people who should not take salmeterol are those who are allergic to salmeterol or its inactive ingredients.
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.
You should also make sure to tell your healthcare provider about all other medicines you may be taking, including prescription and non-prescription medicines, vitamins, and herbal supplements.