A class of drugs that block beta-adrenergic substances such as adrenaline (epinephrine), a key agent in the "sympathetic" portion of the autonomic (involuntary) nervous system. By blocking the action of the sympathetic nervous system on the heart, beta blockers relieve stress on the heart. They slow the heart beat, lessen the force with w [..]

A so-called website blocker is something that prevents search engines from accessing the site. As a result the website cannot be included in the search engine index and will not appear in the search r [..]

see Wedge Barriers.

Drugs that bind to but do not activate Adrenergic Receptors. Adrenergic antagonists block the actions of the endogenous adrenergic transmitters Epinephrine and Norepinephrine.

Drugs that bind to but do not activate alpha-Adrenergic Receptors thereby blocking the actions of endogenous or exogenous Adrenergic Agonists. Adrenergic alpha-antagonists are used in the treatment of [..]

A subclass of Sodium Channel Blockers that are specific for ACID-SENSING Sodium Channels.

Drugs that bind to but do not activate beta-Adrenergic Receptors thereby blocking the actions of beta-Adrenergic Agonists. Adrenergic beta-antagonists are used for treatment of Hypertension, Cardiac A [..]

A class of Drugs that act by selective Inhibition of Calcium influx through Cell Membranes or on the release and binding of Calcium in intracellular pools. Since they are inducers of vascular and othe [..]

Compounds that inhibit or block the activity of Cannabinoid Receptors.

Endogenous and exogenous compounds and that either inhibit Caspases or prevent their activation.

Drugs that interrupt transmission at the skeletal Neuromuscular Junction by causing sustained depolarization of the Motor End Plate. These agents are primarily used as adjuvants in surgical Anesthesia [..]

Drugs that bind to but do not activate Dopamine Receptors, thereby blocking the actions of Dopamine or exogenous agonists. Many Drugs used in the treatment of Psychotic Disorders (Antipsychotic Agents [..]

Agents having as their major action the interruption of Neural Transmission at Nicotinic Receptors on postganglionic autonomic Neurons. Because their actions are so broad, including blocking of sympat [..]

Drugs that selectively bind to but do not activate Histamine H2 Receptors, thereby blocking the actions of Histamine. Their clinically most important action is the Inhibition of acid Secretion in the [..]

Drugs that selectively bind to but do not activate Histamine H3 Receptors. They have been used to correct Sleep Disorders and Memory Disorders.

Drugs that interrupt transmission of nerve impulses at the skeletal Neuromuscular Junction. They can be of two types, competitive, stabilizing blockers (Neuromuscular Nondepolarizing Agents) or noncom [..]

Drugs that interrupt transmission at the skeletal Neuromuscular Junction without causing depolarization of the Motor End Plate. They prevent Acetylcholine from triggering Muscle Contraction and are us [..]

A class of Drugs that act by Inhibition of Potassium efflux through Cell Membranes. Blockade of Potassium Channels prolongs the duration of Action Potentials. They are used as Anti-Arrhythmia Agents a [..]

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