Nopidol 50mg Injection is a pain-relieving medicine. It is used to manage persistent, moderate to severe chronic pain that requires continuous, around-the-clock treatment. Nopidol 50mg 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 nausea, constipation, dry mouth, sleepiness, dizziness, and vomiting. 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 problems with your heart, liver, or kidneys. 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.