Achillea millefolium (Yarrow)
Alcohol (wine, beer, etc.)
Amoracia rusticana (Horseradish)
Banisteriopsis caapi (contains harmine, harmaline, tetrahydroharmine)
Berberis vulgaris (Barberry)
Black cohosh (Cimicifuga racemosa)
Cocao (contains theobromine)
Cocoa (contains theobromine)
Coleus forskholii (Coleus)
Coptis spp. (Goldenthread)
Chocolate (contains theobromine)
Cinnamon
Eleutherococcus senticosus (Siberian ginseng)
Garlic (Allium sativum)
Ginger (Zingiber officinale)
Ginkgo biloba
Harmaline
Harmine
Hawthorn
Huperzine
Kola nut (contains theobromine)
L-Arginine
Marijuana (THC)
Melissa offiicnalis (Lemon Balm)
Olea europaea (Olive leaf)
Peganum harmala (contains harmine, harmaline, tetrahydroharmine)
Panax ginseng (Chinese Ginseng)
Passiflora incarnata (AKA Passionflower, contains mostly harman, and a little harmaline, harmalol and harmine)
Petroselinum crispum (Parsley)
Rauwolfia serpentina (Indian Snakeroot)
Scutellaria baicalensis (Baical Skullcap)
Tetrahydrocannabinol (THC)
Tetrahydroharmine
Theobromine
Tilia europaea (Linden Flower)
Trigonella foenum-graecum (Fenugreek)
Urtica dioica (Nettles)
Valeriana officinalis (Valerian)
Veratrum viride (American Hellebore)
Viburnum spp. (Cramp, Bark, Black Haw)
Vincamine
Vinpocetine
Viscum album (European Mistletoe)
Vitamin B3 (niacin)
Xanthoxylum americanum (Prickly Ash)
Yohimbe (contains yohimbine)
Yohimbine