1.   Most of the psychotic episodes experienced by people using Halcion involved high doses for extended periods of time.

2.   Both were participating in a study involving high doses of chemotherapy for advanced breast cancer.

3.   About half these cases did not involve toxic doses of acetaminophen.

4.   Psychiatric researchers say animal studies involve doses of ketamine much higher than those used in their research.

5.   They include antibiotics called cephalosporins, some of which involve doses only twice a day for five days.

6.   When she went to Stanford for an arduous six-week procedure that involved high doses of chemotherapy and a blood-cell transplant, he moved down there.

7.   Anti-retroviral therapy involves daily doses of three or more anti-retroviral drugs to people with HIV.

8.   The study involved daily doses of tablets containing vitamins C, E and beta-carotene plus zinc.