Certain medications, injected directly into a cranial artery, block the synaptic transmission of epsilon energy, and offenders must report for bidekial treatment.

This medication can block the growth of breast cancer.

In treating ulcers, the medications block proteins called receptors on the surface of intestinal cells that when activated cause the cells to produce peptic acids.

Some medications may block the actions of metoclopramide.

Unfortunately, these medications also block several other neurotransmitters that may not be associated with depression.

These medications block the effects of prostaglandin hormones.

These medications - injected into the eye - block the development of new blood vessels and leakage from the abnormal vessels within the eye that cause wet macular degeneration.

Others with more pronounced and frequent dry eye symptoms may need other medications or a procedure to block the exit ducts.

Another medication, Tysabri (natalizumab), blocks certain types of white blood cells that are involved in inflammation.

Most anti-allergy medications block the histamine from binding to its receptor and are called antihistamines.