[8][9] In June 2019, Larsen closed the Hastings location of the dispensary due to a court order after a long legal battle with the city.

[10][11] In October 2019, the West End dispensary location was raided by the BC "Community Safety Unit" who confiscated all the cannabis in the shop.

[16][17][18][19] They use FTIR Spectrometers, fentanyl test strips and other tools to offer free analysis of any drug or substance.

[22] In June 2019, Larsen moved the service into his empty cannabis dispensary location at 872 East Hastings a few weeks after it had been forced to close.

[23][24] In December 2023, a second Get Your Drugs Tested storefront was opened at 245 West Broadway, next door to a Medicinal Mushroom Dispensary location.

[36][37] The location also sells herbs and plants including peyote, kratom, san pedro and psychedelic microdoses.

[44][45] In response to the police raid, in late December 2023 Larsen sent a gram of psilocybe mushroom and a single coca leaf to all 87 members of the BC Legislature, calling it a Christmas gift.

[46][47] He included user guides, an invitation to visit his dispensaries and Get Your Drugs Tested storefront, and a Christmas card.

[59] In the 2000 Canadian federal election, Larsen ran as the Marijuana Party candidate for the riding of West Vancouver-Sunshine Coast,[60] receiving 3% of the vote.

[61] In the 2001 British Columbia provincial election, Larsen ran as a BC Marijuana Party candidate in the Powell River-Sunshine Coast riding, receiving 3.5% of the vote.

"[63][66] Larsen has since claimed that End Prohibition was instrumental in passing progressive drug-policy resolutions through the provincial NDP in British Columbia, Saskatchewan and Ontario.

However, he resigned on September 17, after videos he had filmed for Pot-TV in 1999 were released to the media, which showed him taking LSD and smoking marijuana.

[70][71][72] On December 29, 2010, Larsen announced his candidacy for the leadership of the British Columbia NDP, running against Adrian Dix, John Horgan, Mike Farnworth and Nicholas Simons.

[132] In 2007, Larsen released Hairy Pothead and the Marijuana Stone, a cannabis-laden Harry Potter parody novel which received international media coverage.

[133][134][135][136][137] In July 2015, Larsen released an illustrated, cannabis-themed Dr Seuss parody book called Green Buds and Hash, which produced some controversy.

"[143] Larsen's other books include The Pie-Eyed Piper, and most recently Sinbad the Strain Hunter: Voyage to Noweedia.

[148] In May 2022, Larsen was included on a list of 657 Canadian politicians, businessmen, journalists and activists sanctioned and banned from entering Russia.