1.   Many drugs interfere with this recycling of transmitters back into the cells that release them.

2.   Many drugs interfere with the reuptake of a neurotransmitter from synapses.

3.   Although they differ widely in chemical makeup, the drugs all interfere with the way calcium flows into and out of human cells.

4.   And while both companies maintain their drugs do not interfere with the immune system, Amevive is considered the stronger of the two.

5.   Instead, they suggest that the drugs interfere with mechanisms that prevent cancer cell growth.

6.   Mice with rodent versions of cystic fibrosis, obesity and other conditions have become valuable tools for scientists to learn about these diseases and the ways drugs can interfere.

7.   Older AIDS drugs such as AZT interfere with the ability of HIV to copy its own genetic material, the first step in making more viruses.

8.   Studies have also shown that the new drugs interfere with the ability of tumor cells to recover from chemotherapy or radiation, thereby enhancing the effectiveness of those treatments.

9.   The drugs interfere with a protein known as EGFR, which plays a crucial role in the growth and survival of tumor cells.