Methnilon 1gm injection is an anti-inflammatory drug belonging to the class of glucocorticoids, containing the active ingredient methylprednisolone. It is used to treat inflammatory or allergic conditions affecting the brain (caused by tumor or meningitis), lungs (caused by asthma, hypersensitivity, tuberculosis, or breathing in vomit or stomach contents), gut, and bowel (Crohn’s disease and ulcerative colitis). It treats rheumatic, skin, eye, and endocrine disorders. It is also used for the palliative management of cancers (leukemia and lymphoma) and the reduction of pain after surgery. In higher doses, it is used to treat flare-ups of symptoms of multiple sclerosis. This injection should not be used if you have a fungal infection, swelling of the brain due to malaria, traumatic brain injury, or if you recently had vaccinated or about to have any vaccination. The common side effects that are likely to occur with this medicine are headache, vision problems, poor wound healing, and bone weakness. Some serious side effects also include blood clots in the leg veins, lungs, and bleeding ulcers. Inform your healthcare provider if these side effects concern you or persist for longer than usual. Consult your doctor immediately for more advice. This drug can increase the risk of certain eye problems, such as posterior subcapsular cataracts and glaucoma. These conditions can lead to vision loss if not treated properly. Additionally, corticosteroids can weaken the immune system, making individuals more susceptible to secondary ocular infections caused by fungi or viruses. Therefore, it is important to use corticosteroids at the lowest effective dose for the shortest possible duration to minimise the risk of these side effects. If you experience any changes in your vision or eye discomfort while taking Methnilon 1gm injection or any other corticosteroid, it is important to inform your doctor right away. Your healthcare provider will monitor your blood pressure, electrolyte levels, and kidney function closely while you are taking corticosteroids to prevent the side effects. In addition, all corticosteroids can increase calcium excretion, which can lead to osteoporosis and increased risk of fractures with prolonged use. Your doctor will prescribe calcium and vitamin D supplementation to help maintain bone health while taking corticosteroids. Tell your physician about all the medications you have been taking recently, including herbal medicines and supplements, before taking this injection.