What should you know about examples of muscle relaxers?

Muscle relaxants are a group of medicines with different actions. Some reduce signals that sustain spasm, while others work more directly on muscle activity. A clinician may consider one for a short-lived painful spasm, such as [Back Muscle Spasm](/symptoms/back-muscle-spasm/), after checking for a strain, nerve irritation or another cause. They do not correct the underlying injury and are not suitable for every cramp or ache.

Drowsiness, dizziness, weakness, dry mouth or reduced alertness can occur with some medicines. Alcohol, sedatives and driving can increase the danger of impaired coordination. The medicine name, dose and duration must be chosen for the individual.

Use only the prescribed amount and ask how long to take it. Until you know how it affects you, avoid driving, heights and machinery. Tell the prescriber about sleep medicines, pain medicines, alcohol use, liver or kidney problems, pregnancy and previous reactions. For [Muscle Cramps](/symptoms/muscle-cramps/), hydration, gradual stretching or treatment of an underlying cause may be more relevant than a relaxant. Do not share these medicines or stop a regular medicine abruptly without advice.

Get urgent help for extreme sleepiness, confusion, fainting, slow or difficult breathing, severe weakness or an allergic reaction. A new spasm with loss of bladder or bowel control, numbness around the groin, or progressing leg weakness also needs emergency assessment. Contact your prescriber if side effects interfere with walking, work or safe daily tasks.

Ask what is causing the spasm, why this medicine is being considered, how quickly it should help, and what non-medicine measures to use alongside it. Clarify alcohol and driving advice, interactions with current medicines, and the plan if symptoms persist.