GPs have voted to end work capability assessment.
They have also called for a more rigourous and safe process to consider the long-term sick and disabled at the GP annual conference yesterday.
Dr Dean Marshall, chairman of the BMA's Scottish General Practitioners Committee, said: "These assessments can have a devastating effect on our patients' mental and physical health. There has been a dramatic increase in the numbers being assessed as fit to work.
"Our patients are very concerned and confused about these assessments. Many are in fear of how they will cope with the removal of, or cuts to, their benefits. Evidence appears to suggest that people with serious health conditions are sometimes being declared fit for work."
The BMA said it was concerned about the impact welfare reform legislation would have.
Dr Marshall said that the wider implications of the reforms needed to be monitored, adding: "A reduction in income may lead to poorer quality of health for individuals and increased health inequalities for our nation as a whole."
The Stage 1 debate on the Welfare Reform Bill took part in the Scottish Parliament yesterday.
