Author(s)

Noemí Santos-Caballero¹, Lina Marcela Barranco-Garduño², José Carlos Aguilar-Carrasco³, Miriam del Carmen Carrasco-Portugal², Francisco Javier Flores-Murrieta^2,4*

¹Landsteiner Scientific, S.A. de C.V., Mexico City, Mexico.
²Unidad de Investigación en Farmacología, Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas, Mexico City, Mexico.
³Departamento de Biología Celular, Instituto Nacional de Perinatología Isidro Espinosa de los Reyes, Mexico City, Mexico.
⁴Sección de Estudios de Posgrado e Investigación, Escuela Superior de Medicina, Instituto Politécnico Nacional, Mexico City, Mexico.

The gastroesophageal reflux and/or peptic ulcer diseases are clinical conditions that occur usually accompanied of symptomatic pain. Lansoprazole, a proton pump inhibitor class drug is widely used in clinical practice for treatment of these diseases. However, its efficacy can be improved by combining with spasmolytic and/or visceral analgesic such as hyoscine butylbromide. Since hyoscine butylbromide is barely absorbed and exerts some local effects at gastrointestinal tract which may modify the absorption of lansoprazole, it is important to establish if there is a pharmacokinetic interaction after the oral concomitant administration of both drugs. For this objective, twenty-five subjects received under a crossover design an oral administration of lansoprazole (15 mg) plus placebo or a fixed-dose combination with hyoscine butiylbromide (15 mg + 10 mg, respectively). Plasma samples were obtained at different times during 10 hours. Lansoprazole plasma concentrations were determined by a high performance liquid chromatography method coupled to tandem mass spectrometry. Fixed-dose combination was well tolerated. Lansoprazole pharmacokinetic parameters were: Cmax 621.81 ± 212.79 and 450.38 ± 192.14 ng/mL; AUC_0-t 1941.36 ± 845.57 and 1454.66 ± 757.28 ng·h/mL; tmax 2.83 ± 0.99 and 3.40 ± 1.82h; t1/2 1.35 ± 0.39 and 1.45 ± 0.51 h, for alone and combined fixed-dose formulation, respectively. Pharmacokinetic parameters were compared by analysis of variance and ratios of AUC_0-t, Cmax and 90% confidence intervals obtained. Since confidence intervals exceed the 80% - 125% limits for these parameters, we conclude that there is a significantly pharmacokinetic interaction of lansoprazole when it is administered concomitantly with hyoscine butylbromide.

Lansoprazole, Hyoscine Butylbromide, Fixed-Dose Formulation, Pharmacokinetic Interaction

Santos-Caballero, N. , Barranco-Garduño, L. , Aguilar-Carrasco, J. , Carrasco-Portugal, M. and Flores-Murrieta, F. (2016) Evaluation of the Influence of Hyoscine Butylbromide on the Oral Bioavailability of Lansoprazole in Healthy Adult Volunteers. Pharmacology & Pharmacy, 7, 264-271. doi: 10.4236/pp.2016.77033.