AAH Pharmaceuticals has added its voice to those demanding clarification from the department of health (DH) over government proposals for generic substitution.AAH group managing director and BAPW deputy chair Mark James said: 'AAH has made a submission to the Department to highlight two areas where further clarification is necessary.Firstly, the Department proposes to give a month’s notice to add or remove a product from the list of products which can be substituted.AAH has called on the DH to begin a dialogue with wholesalers and the PSNC to determine if that notice period is sufficient to manage stocks at both wholesaler and pharmacy levels.Secondly, if the DH intends to press ahead with its proposals, it needs to start talking to PMR providers about how much notice period they will require in order to update systems, what new functionality will be required and when, how will this align with other competing demands from other pharmacy e-programmes and, critically, who will pay for this development work.' AAH is the latest in a series of companies and pharmacy industry bodies to call for clarification from the DH. Last week, the NPA attacked DH plans for generic substitution.