Cannabis products are rapidly changing. The THC level or ‘strength’ of cannabis flower has increased, particularly in North American markets. Cannabis products have also diversified towards more ‘processed’ forms, including vaping liquids, oral liquids, edibles and beverages, and a wider range of solid concentrates. At the same time, the use of non-THC ‘CBD’ products has increased, particularly among consumers using cannabis products for therapeutic reasons.
Our research is examining changes in product forms and patterns of use, including potential implications for problematic cannabis use. Our work is also helping to develop the methods for assessing different product forms in population-based surveys and self-reported measures.
Recent papers
Canada’s THC Unit: Applications for the Legal Cannabis Market.
Wood S, Gabrys R, Freeman T, Hammond D. International Journal of Drug Policy 2024; In Press.
Bhatia D, Sakai J, Reddy S, Mikulich S, Hammond D.
Obstetrics & Gynecology 2024; In press.
Marquette A, Iraniparast M, Hammond D.
British Medical Journal Open 2024; 14(1):e077908.
D’Mello K, Chan GCK, Hall W, Rychert M, Wilkins C, Hammond D.
The American Journal of Drug and Alcohol Abuse 2023; 49(5): 640-651.
Fataar F, Driezen P, Owusu-Bempah A, Hammond D.
Drug and Alcohol Review 2023; 42(6):1534-1546.
Hobin EP, Weerasinghe A, Boniface S, Englund A, Wadsworth E, Hammond D.
Journal of Psychopharmacology 2023; 37(5):462.
Wadsworth E, Rynard V, Driezen P, Freeman TP, Rychert M, Wilkins C, Hall W, Gabrys R, Hammond D.
Harm Reduction Journal 2023; 20(1): 19.
Chu A, Chaiton M, Kaufman P, Goodwin R, Lin J, Hindocha C, Goodman S, Hammond D.
International Journal of Environmental Research and Public Health 2023; 20(5): 4206.
Wadsworth E, Fataar F, Goodman S, Smith D, Renard J, Gabrys R, Jesseman R, Hammond D.
BMC Public Health 2022; 22(1):2048.
Trends and socio-demographic differences of cannabis vaping in the USA and Canada.
Lim C, Chan G, Wadsworth E, Stjepanović D, Chiu V, Cung JYC, Sun T, Conor J, Leung J, Gartner C, Hall W, Hammond D.
International Journal of Environmental Research and Public Health 2022; 19(21):14394.
Hammond D, Goodman S, Wadsworth E, Freeman TP, Kilmer B, Schauer G, Pacula RL, Hall W.
International Journal of Drug Policy 2022;105:103716.
Goodman S, Wadsworth E, Hammond D.
Journal of Studies on Alcohol and Drugs 2022; 83(3):392-401.
Home cultivation across Canadian provinces after cannabis legalization.
Wadsworth E, Cristiano N, Pacheco K, Jesseman R, Hammond D.
Addictive Behaviors Reports 2022; 15:100423.
Wadsworth E, Hines LA, Hammond D.
Substance Abuse 2022; 43(1):943-948.
Rup J, Freeman T, Perlman CP, Hammond D.
Substance Use & Misuse 2022; 57(5):719-729.
Lineham J, Wadsworth E, Hammond D.
Drug and Alcohol Review 2023; 42(5):1142-1152.
Use and perceptions of cannabidiol (CBD) products in Canada and the USA.
Goodman S, Wadsworth E, Schauer G, Hammond D.
Cannabis and Cannabinoid Research 2022; 7(3):355-364.
Rup J, Freeman T, Perlman C, Hammond D.
Addictive Behaviors; 2021; 121:106991.
Lensch T, Sloan K, Ausmus J, Pearson J, Clements-Nolle K, Goodman S, Hammond D.
Preventive Medicine 2020; 141:106320
Hammond D, Goodman S.
Cannabis and Cannabinoid Research 2020; 7(3):345-354.
Consumer perceptions of ‘legal’ and ‘illegal’ cannabis in US states with legal cannabis sales.
Fataar F, Goodman S, Wadsworth E, Hammond D.
Addictive Behaviors 2020; 112:106563.
Does unit-dose packaging influence understanding of serving size information for cannabis edibles?
Goodman S, Hammond D.
Journal of Studies on Alcohol & Drugs 2020;81(2):173-179.
Prevalence and forms of cannabis use in legal vs. illegal recreational cannabis markets.
Goodman S, Wadsworth E, Leos Toro C, Hammond D.
International Journal of Drug Policy 2020; 67:102658.
Wadsworth E, Craft S, Calder R, Hammond D.
Addictive Behaviors 2022; 179:107258.
Sikorski C, Leos-Toro C, Hammond D.
Substance Use & Misuse 2021; 56(4):449-457.
Prevalence and modes of cannabis use among youth in Canada, England, and the US, 2017 to 2019.
Hammond D, Wadsworth E, Reid JL, Burkhalter R.
Drug and Alcohol Dependence 2021; 219: 108505.
Hammond D.
International Journal of Drug Policy 2021; 91:102509.
Methods to assess cannabis consumption in population surveys: results of cognitive interviewing.
Goodman S, Leos Toro C, Hammond D.
Qualitative Health Research 2019;29(10):1474-1482.
Cannabis labelling and consumer understanding of THC levels and serving sizes.
Leos-Toro C, Fong GT, Meyer S, Hammond D.
Drug and Alcohol Dependence 2020; 208:107843.
Retail price and availability of illicit cannabis in Canada.
Mahamad S, Hammond D.
Addictive Behaviours 2019;90:402-408.
