| The FDA pulled phenformin off the shelves in the 1970s because it had toxic side effects. |
| In another case, he said there was evidence that a banned drug, Phenformin, has been put into the supplements. |
| Metformin and phenformin block the peripheral antinociception induced by diclofenac and indomethacinon the formalin test. |
| Phenformin, another biguanide, was withdrawn from the market after a rate of 40 to 64 cases of lactic acidosis per 100,000 patient-years was reported. |
