Question: what herbs are dangerous to mix?
Answer: Fenugreek. People with diabetes should watch out for this herb, Gorin noted. ... 
Melatonin. Don't mix this with sedatives such as benzodiazepines, narcotics, and some antidepressants. ... 
St. ... 
Gingko biloba. ... 
Echinacea. ... 
Schisandra.