If you suffer from depression or are susceptible to psychosis you should never use psychoactive substances without professional guidance. This certainly applies to psychedelics like Liberty caps. Also do not use them if you are pregnant. You can smoke cannabis during a mushroom trip, however, be aware that cannabis can intensify the effects of mushrooms considerably. Combining Liberty caps with other substances is not recommended.
Do you want to go out searching for this mysterious mushroom after reading this? Then an organised excursion to find Liberty caps is perhaps something for you. This way you increase the chance of encountering them and you won’t make a mistake. Here you can read a news item on an Azarius employee who did such an excursion.