Cannabis Dopaminergic Effects Induce Hallucinations in a Patient with Parkinson's Disease

Cannabis products that contain the tetrahydrocannabinol (THC) cannabinoid are emerging as promising therapeutic agents for the treatment of medical conditions such as chronic pain. THC elicits psychoactive effects through modulation of dopaminergic neurons, thereby altering levels of dopamine in the brain. This case report highlights the complexity associated with medicinal cannabis and the health risks associated with its use. A 57-year-old male with Parkinson's disease was experiencing worsening tremors and vivid hallucinations despite therapy optimization attempts. It was discovered that the patient took cannabis for chronic back pain, and a pharmacogenomics (PGx) test indicated the presence of variants for the COMT and HTR2A genes. These variants could increase dopamine levels and predispose patients to visual hallucinations. Once the cannabis was discontinued, the patient's hallucinations began to slowly dissipate. Cannabis use continues to expand as it gains more acceptance legally and medicinally, but cannabis can affect the response to drugs. This patient case suggests that cannabis use in combination with dopamine-promoting drugs, especially in a patient with genetic variants, can increase the risk for vivid hallucinations. These conditions support the importance of considering herb-drug interactions and PGx data when performing a medication safety review.

Medienart:

E-Artikel

Erscheinungsjahr:

2021

Erschienen:

2021

Enthalten in:

Zur Gesamtaufnahme - volume:57

Enthalten in:

Medicina (Kaunas, Lithuania) - 57(2021), 10 vom: 14. Okt.

Sprache:

Englisch

Beteiligte Personen:

Pizzolato, Katie [VerfasserIn]
Thacker, David [VerfasserIn]
Toro-Pagán, Nicole Del [VerfasserIn]
Hanna, Abeer [VerfasserIn]
Turgeon, Jacques [VerfasserIn]
Matos, Adriana [VerfasserIn]
Amin, Nishita [VerfasserIn]
Michaud, Veronique [VerfasserIn]

Links:

Volltext

Themen:

7J8897W37S
COMT
CYP2C9
Cannabis
Case Reports
Dopamine Agents
Dronabinol
Hallucinations
Parkinson’s disease
Pharmacogenomics

Anmerkungen:

Date Completed 26.10.2021

Date Revised 26.10.2021

published: Electronic

Citation Status MEDLINE

doi:

10.3390/medicina57101107

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM332242862