Suxamethonium

Suxamethonium belongs to a group of medicines called muscle relaxants. It is used along with general anesthesia or sedatives to provide skeletal muscle relaxation during surgical procedures. It is also used to facilitate emergency airway management in patients in intensive care.

Suxamethonium is administered by a healthcare professional. You should not self- administer this medicine at home. The dose and duration will depend on what you are taking it for and how well it helps your symptoms.

The most common side effects of this medicine include stomach pressure, excessive salivation, muscle twitching, and postoperative muscle pain. Other common side effects include increased intraocular pressure, slow heart rate, increased heart rate, flushing of the skin, high blood pressure, low blood pressure, rash, and increased potassium level in blood. If any of these side effects persist or get worse, you should let your doctor know. Your doctor may be able to suggest ways of preventing or reducing the symptoms.

Before using it, to make sure it is safe for you, you should let your doctor know if you have any other medical conditions or disorders. You should also tell your doctor all the other medicines you are using or taking. Pregnant and breastfeeding women should consult their doctors before using this medicine.

• Skeletal muscle relaxation during surgery

Skeletal muscle relaxation during surgery
Suxamethonium is used to relax muscles during anesthesia and surgical procedures. It works by blocking chemical messengers in the brain that are responsible for rigidity, inflammation, or swelling. It effectively relieves muscle stiffness or spasm, thereby improving muscle movement.
It is given as an injection by a doctor or nurse and should not be self- administered. The dose and duration will be decided by the doctor depending on the condition you are being treated for. This will help you to go about your daily activities more easily and have a better, more active, quality of life.

Most side effects do not require any medical attention and disappear as your body adjusts to the medicine. Consult your doctor if they persist or if you’re worried about them

Common side effects of Myorelex

• Stomach pressure
• Excessive salivation
• Muscle twitching
• Postoperative muscle pain
• Increased intraocular pressure
• Slow heart rate
• Increased heart rate
• Flushing of skin
• High blood pressure
• Hypotension (low blood pressure)
• Rash
• Increased potassium level in blood

Your doctor or nurse will give you this medicine. Kindly do not self administer.

Suxamethonium relaxes the muscles by blocking the impulses from the nerves.

• Suxamethonium is given as an injection into vein under the supervision of a doctor.
• It makes you feel dizzy or drowsy. Do not drive until you know how Suxamethonium affects you.
• Your doctor will monitor your blood pressure regularly as the medicine may lead to high blood pressure.
• Inform your doctor if you are pregnant, planning pregnancy or breastfeeding.

Suxamethonium. Co Dublin, Ireland: Mercury Pharma International Ltd.; 1990 [revised Jul. 2018]. [Accessed 02 Apr. 2019] (online) Available from:

Suxamethonium. Business Campus, Dublin: Aspen Pharma Trading Limited; 30 Aug. 1985 [revised 1 Aug. 2017]. [Accessed 02 Apr. 2019] (online) Available from: