Liofen 500 Injection is a muscle relaxer. It is used to treat muscle symptoms such as rigidity, tension, and stiffness that may occur due to various conditions such as cerebral palsy, multiple sclerosis, motor neuron disease, or injury to the head, brain or spine. Liofen 500 Injection is generally 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 injection site reactions (such as pain, redness, and swelling), fatigue, drowsiness, weakness, and dizziness. 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, you should let your doctor know if you have ever had seizures, stomach ulcers, diabetes, problems with your heart, liver, or kidneys, etc. Let your doctor also know about all the other medicines you are taking because they may affect, or be affected by, this medicine.If you are pregnant or breastfeeding, it is important to ask the advice of your doctor before taking this medicine. Your doctor may also regularly monitor your kidney function, liver function, and levels of blood components if you are taking this medicine for long-term treatment.