As with any cannabinoid product, THP420 cartridges can cause side effects, although these vary depending on the individual and the dosage. Commonly reported side effects include dry mouth, dry eyes, and slight dizziness, particularly if taken in larger doses. Some users may also experience mild anxiety or paranoia, though this is typically less pronounced with THP420 than with traditional THC, due to its smoother, less intense effects. It’s important to start with a small dose, especially if you’re new to THP420, to gauge how your body reacts. Staying hydrated and using the product in a comfortable environment can also help minimize potential side effects  .