Below are some of the details of Betamethasone(generic)
 

Betamethasone is a moderately potent glucocorticoid steroid with anti-inflammatory and immunosuppressive properties. Unlike other drugs with these effects, betamethasone does not cause water retention. It is applied as a topical cream, ointment, foam, lotion or gel to treat itching (e.g. from eczema). Betamethasone sodium phosphate is sometimes prescribed as an intramuscular injection (I.M) for itching from various ailments including allergic reactions to poison ivy and similar plants.
The compound is available as a number of ester derivatives: betamethasone dipropionate (branded as Diprosone, Diprolene and others), sodium phosphate and valerate (branded as Betnovate, Celestone and others).