Thank you for the query. I have gone through your query and understood your concerns. Your thinking is absolutely correct about steroids
as they are not always safe to use but you must keep in mind that it will be not safe only when used for long time and with long doses. At present follow the instructions given by your doctor as steroids will act fast to treat costochondritis
in short period. If you are using the steroids for long you need to taper the dose while stopping the drug.Thank you.