one example of a drug whose action varies according to the mode of administration adopted is offered by the estrogens which may be given orally ( estradiol valerianate , estriol , conjugated estrogens , etc . ) or parenterally ( estradiol valerianate intramuscularly ; conjugated estrogens and estriol vaginally , estradiol as a skin gel , by subcutaneous implant or transdermally ) .
C0014939
estrogens
C0014938
conjugated estrogens