Eisai Inc., of Woodcliff Lake, N.J., and Arena Pharmaceuticals Inc., of San Diego, said Mexican regulators granted approval of weight management drug Venespri (lorcaserin HCl) for commercialization, by Eisai Laboratorios S. de R.L. de C.V., as an adjunct to a reduced-calorie diet and increased physical activity in adults with a body mass index of 30 kg/m2 or greater.