Singular allergy medicine

Hi! Doctor prescribed me Singular allergy medicine. I have asthma caused by allergy. I want to know proper use this medicine. Doctor told me something about that, but I don’t remember.

Hi! I also use this drug. Singular is used to prevent asthma attacks. It is not used to relieve an attack that has already started. For relief of an asthma attack that has already started, you should use another medicine. If you do not have another medicine to use for an attack or if you have any questions about this, check with your doctor. If you use oral granule form of this medicine you can take on a full or empty stomach. Packet of oral granules may either be swallowed whole or mixed with a spoonful of soft food such as applesauce, carrots, rice or ice cream. I hope that you are satisfied with information.

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Hi! Doctor prescribed me Singular allergy medicne. I have noticed that I get severe heartburn, is this to be expected or should I talk to doctor about it?