”Oral methotrexate has been used with great success in treatment of rheumatoid arthritis and psoriasis for the past 50 years.”
Review J Clin Gastrenterol (PubMed.gov / NIH)
. 2005 Oct;39(9):751-6. doi: 10.1097/01.mcg.0000177249.46130.a3. Low-dose oral methotrexate for maintaining Crohn's disease remission: where we stand
John H Sun 1 , Kiron M Das Affiliations expand PMID: 16145336 DOI: 10.1097/01.mcg.0000177249.46130.a3
However, regardless of its wide use and acceptance, it stands a good chance of either being outlawed completely - in some states, or doctors who have prescribed it for decades will be persuaded to cease using it for their patients. All because...(gasp!)
Methotrexate is an abortifacient and it is used to treat ectopic pregnancies, provided the fallopian tube has not ruptured.[4][25] Methotrexate with dilation and curettage is used to treat molar pregnancy. Rarely, it is used in combination with mifepristone to abort uterine pregnancies.[26]
The horror.
That misuse of the drug (as baby-poison) is not exactly rare.
Legitimate uses of drugs continue even when illegitimate or dangerous uses are prohibited.
Thalidomide, for example, is a very useful drug for a variety of diseases. It's just never given to women who are or are trying to become pregnant.