As a result , both Carl Warburg and his eponymous drug were distrusted by many in the medical profession , particularly in England .
Warburg 's Tincture was sold as a secret , proprietary remedy for over forty years .
Both Carl Warburg and his eponymous drug were distrusted by many in the medical profession , particularly in England .
Warburg 's Tincture was sold as a secret , proprietary remedy for over forty years .