A lethal dose will usually cause death within an hour.

One dose couldn't cause significant harm, or so he'd hoped.

It is true that high doses can cause respiratory failure in people who are not already taking the drugs.

High doses for several weeks may cause liver damage and death.

Research has indicated that even small doses cause cancer in laboratory animals.

Some research suggests that high doses might increase the chance of death and possibly cause other serious side effects.

Higher doses given for other types of cancer do cause infertility.

High doses may cause breathing problems, paralysis, and even death.

High doses of vitamin B6 can cause problems with the nervous system.

Missing doses of blood pressure medications can also cause it.