Percutaneous absorption of betamethasone-17, 21-dipropionate and salicylic acid during the treatment of psoriasis and eczema.

The percutaneous absorption of betamethasone-17, 21-dipropionate and salicylic acid was studied after one and two weeks' treatment of psoriaris and eczema. The treated areas varied between 8 and 41 dm2. No change in the plasma cortisol levels was detectable by the routinely used laboratory method. The treatment gave no detectable salicylate concentrations in plasma.