The cause of fibromyalgia is unknown; however, it is believed to involve a combination of genetic and environmental factors with half the risk attributed to each. The condition runs in families and many genes are believed to be involved.
Agonist: A substance that acts like another substance and therefore stimulates an action. Agonist is the opposite of antagonist. Antagonists and agonists are key players in the chemistry of the human body and in pharmacology.
A receptor antagonist is a drug that binds to a receptor but does not send any signal. A receptor antagonist can block other ligands from binding. In this way, an antagonist can block the effects of agonists, whether those agonists are drugs or neurotransmitters.Some alcohol antagonists are receptor antagonists, but many are not. Do not be confused. receptor antagonist can block other ligands from binding. In this way, an antagonist can block the effects of agonists, whether those agonists are drugs or neurotransmitters. Some alcohol antagonists are receptor antagonists, but many are not. Do not be confused.