topical gel vehicle

The topical gel vehicle is an inactive pharmaceutical formulation developed by Pfizer to serve as a control or placebo in clinical trials for topical pain medications, specifically Ibuprofen 5% topical gel. It contains the same excipients as the active drug product but lacks the active pharmaceutical ingredient (ibuprofen). In Phase 1 studies, such as cumulative irritancy patch tests (CIPT), this vehicle is evaluated to determine the baseline skin irritation potential of the gel base itself. This ensures that any observed adverse effects in the treatment arm are attributable to the active ingredient rather than the delivery medium. The vehicle is typically applied under occlusive conditions over a period of 21 days to assess human volunteer skin tolerance.

Other names

Topical gel vehicletopical gel vehicle-Pfizer-pain