Haskovo police detained five drivers, the regional police directorate (ODMVR) said in its bulletin on 12 October.
Four of them drove after drinking alcohol or taking drugs. The fifth rode an unregistered motorcycle after drinking.
The highest alcohol reading was 2.67 per mille, for a 60-year-old driver. Another driver, aged 43, had 2.6 per mille, and a 51-year-old tested at 1.49 per mille.
A 45-year-old man drove under the influence of methamphetamine.
The motorcyclist is also 43. His test showed 2.31 per mille.