From Medicine Plus:
Reishi mushroom might lower blood pressure. Taking it with other supplements that have the same effect might cause blood pressure to drop too much. Examples of supplements with this effect include andrographis, casein peptides, L-arginine, niacin, and stinging nettle
https://medlineplus.gov/druginfo/natural/905.html
From Web MD:
Interactions. If you take any medicines or supplements regularly, talk to your doctor before you start using arginine. They could interact with birth control medicines, hormone therapy drugs, blood thinners, some painkillers, and medicines for erectile dysfunction, heartburn, high blood pressure, and diabetes. Arginine could also interact with supplements like ginkgo biloba, garlic, Asian ginseng, and potassium.
https://www.webmd.com/diet/supplement-guide-l-arginine
I take a lot of general vitamins and supplements such as B vitamins, CoQ10, D3. K2, and many others. I have not had any problem with them interacting.