Swiss Cannabis Pilot Projects — Comparison, Enrolment, Results
The authoritative overview of every approved Swiss cannabis pilot under Art. 8b Narcotics Act: Züri Can, Weed Care, SCRIPT, Cann-L, Grashaus Projects and the Geneva study. Study design, eligibility, interim findings and what the evidence means for the 2029 regulation window.
- Active pilots
- 2
- Participants (target)
- 7,068
- Participating cantons
- 6
- Legal basis
- NarcA Art. 8a + pilot ordinance
- Supervising authority
- FOPH
Legal basis — Art. 8b Narcotics Act
Since 15 May 2021, Art. 8b of the Swiss Narcotics Act (NarcA) allows time-limited scientific pilot trials with non-medical cannabis. The Cannabis Pilot Trials Ordinance sets the maximum duration (5 years + 2-year extension), participant caps, THC limits and reporting duties. The Federal Office of Public Health (FOPH) is the supervising authority.
All 6 pilot projects compared
| Study | City / canton | Operator | Participants (target) | Status | Products |
|---|---|---|---|---|---|
| Züri Can — Cannabis mit Verantwortung | Zurich · ZH | Stadt Zürich, Sozialdepartement · ISGF Uni Zürich | 2'100 / 2'100 | Active | Blüten, Hasch (Bio, IP-Suisse) |
| Weed Care | Basel · BS | Universitäre Psychiatrische Kliniken (UPK) Basel | 378 / 400 | Closed (analysis) | Blüten, Hasch |
| SCRIPT — Study on Cannabis Regulation in Practice | Bern · BE | Stadt Bern · Universität Bern (ISGF) | 1'240 / 1'300 | Active | Blüten, Hasch, Vape-Kartuschen |
| Cann-L | Lausanne · VD | Ville de Lausanne · Unisanté | 850 / 1'200 | Recruiting | Fleurs, résine |
| Grashaus Projects | Olten / Bern / Biel / Lucerne · SO/BE/LU | Grashaus Projects AG · Uni Basel | 1'600 / 4'200 | Recruiting | Blüten, Hasch, Vapes |
| Étude cannabis Genève | Geneva · GE | Ville de Genève · HUG · Addiction Suisse | 900 / 1'500 | Recruiting | Fleurs bio, résine |
Sources: FOPH, ISGF, city releases. THC cap: ≤ 20 % across pilots.
How to join a pilot project
Enrolment is local to each project — there is no federal portal.
- 1Registered residence in the study city/region for at least 3–6 months.
- 2Age 18+ and documented prior regular cannabis use.
- 3No pregnancy, no ongoing addiction treatment, no severe psychiatric diagnosis.
- 4In-person appointment at the study centre, informed-consent interview.
- 5Purchases only at the assigned dispensing site with your study ID.
Interim results 2024–2026
Published interim reports (Weed Care, ISGF, Uni Bern) show no rise in problematic use and a decline in black-market contact among participants.
- Weed Care (Basel): 74 % of participants stabilised or reduced consumption at 18 months; no increase in psychotic episodes.
- Züri Can (Zurich): 82 % protocol adherence; median 7 g/month; black-market leakage below 5 %.
- SCRIPT (Bern): first 12-month cohort strongly prefers labelled THC/CBD flowers.
- Pricing: 8–12 CHF/g across pilots — deliberately anchored to the black-market to measure substitution.
2026–2029 roadmap
The pilots supply the evidence base for a future Swiss cannabis act.
FAQ
Q1.How many cannabis pilot projects are there in Switzerland?
Six approved trials under Art. 8b NarcA: Züri Can (ZH), Weed Care (BS), SCRIPT (BE), Cann-L (VD), Grashaus Projects (SO/BE/LU) and the Geneva study (GE).
Q2.Is participation legal?
Yes — only for enrolled participants under the study protocol. Outside the study, possession above 10 g remains punishable.
Q3.Can I join Züri Can if I live in Winterthur?
No — Züri Can is restricted to registered residents of the City of Zurich.
Q4.What happens after the study ends?
The data feeds Swiss cannabis legislation; dispensing stops without a new legal framework.
Q5.What if there's no pilot in my region?
CBD products (<1 % THC) remain legal; clubs such as CannabisClub provide a community framework.
Q6.Are the products organic and traceable?
Yes — Swiss organic or IP-Suisse cultivation, lot numbers, certificates of analysis (THC/CBD/pesticides/heavy metals) and full traceability.
No pilot in your canton?
23 of 26 cantons have no dedicated pilot. CannabisClub offers a legal, community-based access route to lab-tested CBD.
How membership worksPrimary sources
- FOPH — Cannabis pilot trials — FOPH / BAG
- ISGF Zurich — addiction research — University of Zurich
- Addiction Switzerland — Addiction Switzerland
- NarcA Art. 8b — Cannabis Pilot Trials Ordinance — Fedlex
- UPK Basel — Weed Care — UPK Basel
Compound deep-dive
Compounds inside pilot-programme flower
What is actually inside FOPH-approved flower? Cannabinoid and terpene profiles with references from Switzerland's ongoing pilot projects.
Data & statistics
Open datasets from the Swiss Cannabis Data Center — CC-BY-4.0, sourced and documented.
The next step starts with us
We’re preparing the next drops. Join for free and help build the community.
CBD today, THC from day 1 — CHF 3–5/g planned
The moment regulated THC sales become legal in Switzerland, we supply existing members — no waitlist, no re-registration. Join free today and you are already verified and in from day 1.
- Membership is free — no fee, no subscription
- Verified today = eligible on day 1, no onboarding queue
- Planned member price CHF 3–5/g instead of CHF 10–15/g at the pharmacy
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