The purpose of a remedy is to heal and cure. If it be productive of worse symptoms, its absence or discontinuance is preferable.
(‘Abdu’l-Bahá, The Promulgation of Universal Peace, p. 117)
Treat disease through diet, by preference, refrain from the use of drugs; and if you find what is required in a single herb, do not resort to a compounded medicament...Abstain from drugs when health is good, but administer them when necessary.
(Bahá’u’lláh, Bahá’u’lláh and the New Era, p. 106)