Hi - Yes there are some contraindications:Anti-Depressants
The MAOIs in cacao can interact with some anti-depressant medication. This can cause migraines.
High doses of SSRI’s - Cacao releases serotonin, so it works as a mild anti-depressant.
When taken with SSRI’s that release serotonin chemically, it can lead to serotonin syndrome.

Heart Issues
People with heart issues, high blood or low blood pressure, or anyone on heart medication.
As Cacao increases heart rate by 20 t0 30%

Other
Pregnant women
Anyone who has any surgery coming up as Cacao thins blood

Please also be mindful that Cacao is dangerous to pets - especially dogs, cats, parrots, and horses.