Decdan B 4mg/ml Injection belongs to a group of medicines called steroids. It is used in the treatment of allergic conditions. It reduces inflammation (redness, tenderness, heat and swelling) in the body and is given in situations where quick treatment is required. Decdan B 4mg/ml Injection is generally given by a healthcare professional. You should not self-administer this medicine at home. Your doctor will decide the dose and how often you should take them. You should take it regularly to get the most benefit from it. Do not stop using the medicine even if you feel better unless the doctor tells you so. Using of the medicine may cause few common side effects such as mood changes, depression, stomach upset, and injection site reactions. You may also experience pain, redness, and swelling at the site of injection. Let your doctor know if any of these side effects bother you. Before using this medicine, inform your doctor if you are allergic to any medicine or have liver problems. This medicine is not recommended during pregnancy. Pregnant and breastfeeding mothers should consult with their doctors before using the medicine.