Antispasmodic & Antispasticity Drugs - Skeletal Muscle Relaxants Clinical Pharmacology

Описание: Skeletal muscle relaxants are medications used to alleviate muscle spasms, spasticity, and related pain. They are commonly prescribed for musculoskeletal injuries, neurological disorders, and chronic conditions like multiple sclerosis.

Types and Mechanisms
Centrally Acting Muscle Relaxants: These work on the central nervous system to reduce muscle tone by modulating neurotransmission. Examples include:

Baclofen: Reduces neuron excitability via GABA_B receptors.
Cyclobenzaprine: Acts at the brainstem to control motor activity.
Tizanidine: Inhibits motor neurons through alpha-2 adrenergic receptors.
Peripherally Acting Muscle Relaxants: These act directly on muscles to interfere with contraction processes.

Dantrolene: Prevents calcium release in muscles, reducing contractions.
Uses
Muscle relaxants are used for:

Acute Muscle Spasms: Short-term relief for injuries and pain.
Chronic Spasticity: Long-term management in conditions like cerebral palsy and multiple sclerosis.
Surgical Procedures: Facilitate muscle relaxation during surgery.
Side Effects
Common side effects include drowsiness, dizziness, and weakness. Due to potential dependence, these medications are typically used short-term or under close medical supervision.