What do systematic reviews say?

d4T vs AZT

d4T showed no clear difference in clinical progression compared with AZT (low certainty).

• Stavudine or zidovudine in three‐drug combination therapy for initial treatment of HIV infection in… 2010 · Cochrane Headline outcomes only
  RR 0.78 [0.28, 2.13]
  7 studies · 719 participants
  Low