Can I eat high potassium foods like bananas? See:
http://www.umm.edu/altmed/articles/potassium-000975.htm
Can I eat high potassium foods like bananas? See:
http://www.umm.edu/altmed/articles/potassium-000975.htm
Ordinary dietary sources shouldn't cause an interaction.
In people with a potassium deficiency, taking additional potassium can lower blood pressure - reducing the need for the propranolol and potentially leading to circulatory problems from too low blood pressure.
If you suspect you may have a potassium deficiency, talk with your doctor about getting a blood test for it.
Otherwise, don't worry about eating the occasional banana or potato.