There are a number of preparations that can be used.  Those with a similar potency should be chosen on a cost per volume basis.

Drug	Dose	Potency
Hydrocortisone Acetate (Hydrocortistab)	25mg/ml	+
Methyl Prednisolone Depo-medrone)	40mg/ml	+ + + + +
Triamcinolone Acetonide (Kenalog/ Adcortyl)	40mg/ml 20mg/ml	+ + + + +
Triamcinolone Hexacetonide (Lederspan)	20mg/ml	+ + + + +
Dexamethasone (Decadron)	4mg/ml	+ + + + + + + + + + + + + +

Images supplied by Mr John Hardy, Consultant Orthopaedic & Trauma Surgeon