Which information source would be most appropriate to consult first, to determine if buprenorphine/naloxone (Suboxone®) is available in a country outside of North America?

Martindale The Complete Drug Reference would be the most appropriate information source to consult first in order to determine the availability of buprenorphine/naloxone (Suboxone®) in a country outside of North America. This reference specifically focuses on drug information, including availability in different countries, whereas options A, B, and D have a broader focus. Compendium of Pharmaceuticals and Specialties provides information on drug products available in Canada, Medline is a medical database and may not have specific information on drug availability, and Cochrane Library database primarily contains information on clinical trials and systematic reviews rather than availability.