Drug firm Glenmark said it has received approval from the US health regulator to market a generic medication to treat diabetes in the American market. Glenmark Pharmaceuticals Inc, USA, a unit of the company, has received tentative approval from the US Food & Drug Administration (US FDA) for Saxagliptin Tablets in strengths of 2.5 mg and 5 mg, the Mumbai-based drug maker said in a statement. The company's product is the generic version of AstraZeneca AB's Onglyza tablets (2.5 mg and 5 mg), it added.