Sounds like a warning one might expect to find on one of the Weasley twins’ products in the Harry Potter franchise, but this disclaimer on a pack of incense comes from the Muggle world.
First, the incense promises a magical world of mystic knowledge and ecstasy, but the small print at the bottom takes it all back:
Sold as curio only, no magical effects are guaranteed.
To which they might want to add:
If you’re experiencing magical effects, it’s probably not from the incense, but from that other product you’re using the incense to cover up.