Dicyclomine, also known as dicycloverine, is an anticholinergic that blocks muscarinic receptors.

Belladonna drops act as an antimuscarinic, blocking receptors in the muscles of the eye that constrict pupil size.

Another way is blocking retionic receptors themselves, although it can also have serious side effects.

Leukotriene antagonists block receptors targeted by leukotrienes released from mast cells.

Rather, these findings are based on the effects of other commonly prescribed drugs that happen to block noradrenergic receptors.

In 2007 it was reported that the venom of the wasp blocks receptors for the neurotransmitter octopamine.

The companies said methylnaltrexone is intended to block receptors that foster these side effects.

In an infected cell, gp70 is thought to block viral receptors, so preventing further infection by the same subgroup.

These drugs work by blocking opioid receptors in the body's cells, and are often used to treat people with drug overdoses.

But the drug is unique in that it also blocks receptors for the chemical serotonin, which helps regulate mood.