Can you take Symbicort and Mucinex DM?

There is no interaction between the two, I took them for over 3 years. I can't take them now because of my heart comdition.

Interactions between your selected drugs
No results found - however, this does not necessarily mean no interactions exist. Always consult with your doctor or pharmacist.

Other drugs and diseases that your selected drugs interact with
Mucinex DM (dextromethorphan / guaifenesin) interacts with more than 200 other drugs and 1 diseases.
Symbicort (budesonide / formoterol) interacts with more than 600 other drugs and 10 diseases.

Interactions between your selected drugs and food
Moderate
budesonide food
Applies to: Symbicort (budesonide / formoterol)
You should avoid the regular consumption of large amounts of grapefruits and grapefruit juice while taking budesonide. Grapefruit can raise the levels of budesonide in your body and lead to increased side effects. Do not increase or decrease the amount of grapefruit products in your diet without first talking to your doctor.
Switch to professional interaction data

Therapeutic duplication warnings
No therapeutic duplications were found for your selected drugs.

https://www.drugs.com/interactions-check.php?drug_list=846-8245,432-2530