Effect of injections of small doses of human fibroblast interferon into genital warts. A pilot study.

Eleven male patients with genital warts were given injections of fibroblast interferon (300 u) and placebo into the bases of two similar warts. The changes in size of the treated warts compared with that of the controls suggested that interferon did inhibit the growth of the warts. The dose given was probably insufficient for a dramatic effect. In one patient, however, a wart on the penile shaft was injected with interferon and did disappear within two weeks whereas an untreated meatal wart increased in size.