41.   Too much vitamin A can produce toxic effects that range from itchy skin, blurred vision and irritability to neurological problems.

42.   Toxic effects have apparently not been reported from consumption of milk thistle, he said.

43.   Connett also objected to considering mottled teeth a purely cosmetic problem, saying it could be an indicator of a toxic effect.

44.   Czech vets seek action on possible toxic effects from Gulf War.

45.   In monkey tests, the drugs have shown no toxic effects, even when given at high doses.

46.   Like PBDE, PFOS had been found to persist in the environment, but little is known about its toxic effects.

47.   Researchers knew that certain bacteria have natural chemicals that block those toxic effects, called antagonists.

48.   Speaking on radio on Tuesday, he said vaccines were tested on animals to see whether there were any toxic effects.

49.   Speaking on radio Tuesday, Vaux said the vaccines were first tested on animals for any toxic effects before they were given to humans.

50.   That could be especially useful for a disease like Hepatitis C, where the symptoms can be less unpleasant than the toxic effects of the treatment.