What do systematic reviews say?

D‐cycloserine vs placebo

D‐cycloserine showed no clear difference in non‐core symptoms of ASD compared with placebo (low certainty).

• The effectiveness and adverse effects of D‐cycloserine compared with placebo on social and communication skills in… 2021 · Cochrane Headline outcomes only
  RR 0.97 [0.49, 1.93]
  1 study · 67 participants
  Low