I found this from DMT Turner's The Essential Psychedelic Guide: "N,N-DMT is significantly intensified by Harmala. Smoking 15-20 mg. of N,N-DMT while on Harmala will produce an experience as intense as smoking 40 mg. of N,N-DMT by itself. This is especially useful because it's difficult to smoke 40 mg. of harsh tasting DMT. Harmala will also extend the N,N-DMT experience to about 30 to 40 minutes total. The high of both types of DMT while on Harmala is a much slower process. I don't feel "blown out of my mind" quite so quickly. The focus of the experience becomes personally involved, rather than the feeling that I'm a voyager in some alien realm. I tend to experience an increased awareness of my mind, body, and subtle energy. I often feel that my body and Being are "embraced" by an ancient earth spirit. And this earth spirit is instructing me to become aware of, and open up, many lines of communication that exist between my mind, body and the extemal world. In combination with Harmala the DMT high does not "disappear," leaving me suddenly back in normal reality. I have more time to absorb the experience and make it a part of me. "