It depends on the particular homeopathic therapy. As a rule of thumb, so long as the therapy does not involve participation in a non-Christian spirituality, it is allowable. As a matter of prudence though, homeopathic treatments should not be used to the exclusion of traditional medical treatments, particularly in emergency or life-threatening circumstances.
__________________ "If anyone comes to me, I want to lead them to Him." --St. Edith Stein