Hydroxydimethyltryptamine (hydroxy-DMT or HO-DMT) may refer to:
4-Hydroxy-N,N-dimethyltryptamine (4-hydroxy-DMT; 4-HO-DMT; psilocin) 5-Hydroxy-N,N-dimethyltryptamine (5-hydroxy-DMT; 5-HO-DMT; bufotenin) 6-Hydroxy-N,N-dimethyltryptamine (6-hydroxy-DMT; 6-HO-DMT) 7-Hydroxy-N,N-dimethyltryptamine (7-hydroxy-DMT; 7-HO-DMT)
See also Substituted tryptamine Methoxydimethyltryptamine (methoxy-DMT) Hydroxydiethyltryptamine (hydroxy-DET)