Prescribing sterile needles is not only beneficial but (mostly) legal.
Marwick
C
C
D015658:HIV Infections / Q000517:prevention & control*; D006525:Hepatitis, Viral, Human / Q000517:prevention & control*; D006801:Humans; D007883:Legislation, Medical; D009339:Needles / Q000600:supply & distribution; D013242:Sterilization; D015819:Substance Abuse, Intravenous; D014481:United States