UNSPSC 51313600: Antihistamine or H1 blocker quinolines

Antihistamine or H1 blocker drugs made from compounds consisting of a catabolite of tryptophan.

UNSPSC 51313600 Antihistamine or H1 blocker quinolines is a Class code that does not align with the state and local procurement activity recently posted under this designation. The code nominally covers a narrow pharmaceutical category — antihistamine medications in the quinoline chemical family — yet the recent opportunities recorded against it involve naloxone (an opioid antagonist unrelated to antihistamines), generic multi-source pharmaceuticals across broad therapeutic categories, and pharmacy benefit program infrastructure. This mismatch suggests the code is either misconfigured in the issuing bodies' procurement systems or applied as a catch-all for pharmaceutical procurement activity that spans multiple UNSPSC classifications.

Issuing bodies placing solicitations under this code include county health departments (Seminole County, Florida), state health and human services agencies (Texas Health and Human Services Commission), and cooperative purchasing alliances serving multiple states and local jurisdictions (Minnesota Multistate Cooperative Purchasing Alliance, which supplies state and local government facilities across Minnesota and Oregon). Recent activity includes an IFB from Seminole County for 1,900 units of naloxone and 800 safe drug deactivation systems annually with a response deadline of July 26, 2023; an RFI from Texas HHS posted April 3, 2026, exploring direct-to-manufacturer prescription fulfillment models; and an RFP from MMCAP posted January 20, 2026, for generic multi-source pharmaceuticals and OTC products with a March 26, 2026 deadline. Geographic activity concentrates in Florida, Texas, and the Upper Midwest, with MMCAP's reach extending across multiple states. Absent a clear alignment between the code's nominal scope and the actual procurement work being solicited, this code shows little decision-relevant activity for vendors focused on antihistamine quinoline products specifically.