He is considered the greatest translator of the ninth century and one of the greatest philosophers of that period.
Another great Arabian physician, whose work was just beginning as Honain's was drawing to a close, was Rhazes (850-923 A.D.), who during his life was no less noted as a philosopher and musician than as a physician.

He continued the work of Honain, and advanced therapeutics by introducing more extensive use of chemical remedies, such as mercurial ointments, sulphuric acid, and aqua vitae.

He is also credited with being the first physician to describe small-pox and measles accurately.
While Rhazes was still alive another Arabian, Haly Abbas (died about 994), was writing his famous encyclopaedia of medicine, called The Royal Book.

But the names of all these great physicians have been considerably obscured by the reputation of Avicenna (980-1037), the Arabian "Prince of Physicians," the greatest name in Arabic medicine, and one of the most remarkable men in history.

Leclerc says that "he was perhaps never surpassed by any man in brilliancy of intellect and indefatigable activity." His career was a most varied one.