JB Chemicals & Pharmaceuticals Ltd plans to more than double the strength of its medical representatives to 1,500 in the next two years to increase penetration in rural markets. Besides, the firm which recently sold its over-the- counter business in Russia and CIS countries to Johnson & Johnson subsidiary Cilag GmbH for a consideration for Rs 938.51 crore, plans to launch a new division catering to gynecology and dental products.