National increase in the community supply of take‐home naloxone associated with a mass media campaign in Scotland: a segmented time series analysis

•Scotland has amongst the highest rates of drug-related deaths (DRD) in Europe.•“How to save a life” (HTSAL) was a national mass media campaign on DRD in Scotland.•An objective of HTSAL was to increase the national supply of take-home naloxone (THN).•HTSAL had a short term, but large and significant increase on national THN supplies.•Our study suggests that mass media campaigns can be used to increase the distribution of THN.