Symbiotic approach

Finally, when additional moieties are grafted to the molecule, one speaks of conjunctive approaches. They can also consist in the attachment of additional structural elements as in the association of two separate drugs (associative synthesis, non-symmetrical twin drugs, the symbiotic approach or in the duplication of the parent drug (symmetrical twin drugs). 

Nicolaus, B. J. R. Symbiotic approach to drug design. In Decision Making in Drug Research (Gross, F., Ed.). Raven Press New York, 1983, pp. 173-186. 

Nicolaus, B.J.R. (1983). Symbiotic approach to dmg design, decision making in drug research. In Gross, F. (ed.). New York, NY, Raven Press. 

---