Sustained-release tramadol formulations with 24-hour clinical efficacy

摘要

There is disclosed a once daily oral pharmaceutical compositon for controlled release of tramadol or a salt thereof, wherein the composition, when ingested orally, provides a clinical effect over 24 hours which is a least as good as the clinical effect over 24 hours of two doses of a twice daily oral pharmaceutical composition for controlled release of tramadol, taken 12 hours apart.