(2010) Access to pain treatment as a human right

http://www.bmcmedicine.biomedcentral.com/articles/10.1186/1741-7015-8-8

Summary:  According to international human rights law, countries have to provide pain treatment medications as part of their core obligations under the right to health; failure to take reasonable steps to ensure that people who suffer pain have access to adequate pain treatment may result in the violation of the obligation to protect against cruel, inhuman and degrading treatment.