Dr Phil believes celebrities shouldn’t “feel guilty” about using weight-loss drugs. Various well-known celebrities – including Oprah Winfrey, Kelly Clarkson and Sharon Osbourne – have confessed to using weight-loss medication over recent months, but the veteran TV star has now hit back at suggestions that they should feel a sense of guilt or shame. Dr Phil – who actually rose to fame on ‘The Oprah Winfrey Show’ in the late 90s – told ‘Extra’: “What business is it of anybody else how someone is managing their health? “If someone is using a tool to help them get back to health, help them lose we…