《關于藥物和治療的醫學信函》（通常稱為《醫學信函》）是一份提供藥物評估的同行評審的兩周一次的醫學期刊。它以英語、法語和意大利語出版。該期刊是在index medicus/medline/pubmed中提取和索引的。2002-2014年，醫學信函（ISSN 1541-2792）中的一個分支，即治療指南被納入本雜志。

The Medical Letter on Drugs and Therapeutics (commonly referred to as The Medical Letter) is a peer-reviewed biweekly medical journal providing evaluations of pharmaceutical drugs. It is published in English, French, and Italian. The journal is abstracted and indexed in Index medicus/MEDLINE/PubMed. An offshoot, Treatment Guidelines from The Medical Letter (ISSN 1541-2792) was published from 2002-2014, when it was integrated into this journal.