Study of the gastrointestinal tolerance of a new tablet formulation of the lopinavir/ritonavir antiretroviral in HIV-infected patients

Javier Sáez de la Fuente, Virginia Granja, Ismael Escobar, Elena Collada de la Fuente, Victor Moreno, Rafael Rubio
Journal of Acquired Immune Deficiency Syndromes: JAIDS 2009 March 1, 50 (3): 294-8

BACKGROUND: Preliminary studies suggest that the new film-coated tablet formulation of lopinavir/ritonavir (LPV/r-fct) could cut down the rate of adverse gastrointestinal symptoms of the conventional lopinavir/ritonavir soft gelatine capsules (LPV/r-sgc).

OBJECTIVE: To ascertain the difference in the rate of adverse gastrointestinal symptoms in patients who switch from LPV/r-sgc to LPV/r-fct.

METHODS: An uncontrolled, open, prospective study including a pre/post comparison using the Gastrointestinal Symptom Rating Scale (GSRS) modified to the characteristics of the protease inhibitors.

RESULTS: Seventy patients were included, with a mean time of treatment, with the new formulation of 77 days [confidence interval (CI) 95%: 70 to 84]. The total GSRS score was 26.96 (CI 95%: 25.02 to 28.89) in the prechange survey and 26.27 (CI 95%: 24.08 to 28.47) in the postchange survey, with a mean difference of 0.69 points (CI 95%: -1.18 to 2.55, P = 0.47). None of the questions obtained the objective of a difference of at least 2 points, previously set as a clinically significant difference. Only 1 patient dropped the study due to gastrointestinal toxicity.

CONCLUSIONS: Our study has unearthed no clinically significant differences in the gastrointestinal tolerance profile of (LPV/r-sgc) and (LPV/r-fct), measuring this tolerance level by application of the GSRS scale.

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