Side effects of ganoderma coffee include a dry nose and mouth or an upset stomach. More serious side effects linked to the coffee include changes in blood pressure, an increased risk of bleeding or hepatitis. Like any caffeinated product, there is a possibility of suffering from increased anxiety and sleeplessness.
Ganoderma coffee is a mixture of instant coffee and dried extract of reishi mushrooms. It is sometimes sold with added sugar and non-dairy creamer. Drinkers claim it reduces inflammation, improves the immune system and helps stop fatigue.
Pregnant women and people suffering from clotting disorders or low blood pressure should avoid ganoderma coffee. There is a risk of the coffee interacting with several common drugs such as ibuprofen and warfarin, so drinkers should check with their physicians or pharmacists before drinking this type of coffee.