INTRON A-treated lesions showed improvement within 2 to 4 weeks after the start of treatment in the above study; maximal response to INTRON A therapy was noted 4 to 8 weeks after initiation of treatment.

The response to INTRON A therapy was better in patients who had condylomata for shorter durations than in patients with lesions for a longer duration.

Another study involved 97 patients in whom three lesions were treated with either an intralesional injection of 1.5 million IU of INTRON A per lesion followed by a topical application of 25% podophyllin, or a topical application of 25% podophyllin alone. Treatment was given once a week for 3 weeks. The combined treatment of INTRON A and podophyllin was shown to be significantly more effective than podophyllin alone, as determined by the number of patients whose lesions cleared. This significant difference in response was evident after the second treatment (Week 3) and continued through 8 weeks posttreatment. At the time of the patient's best response, 67% (33/49) of the INTRON A- and podophyllin-treated patients had all three treated lesions clear while 42% (20/48) of the podophyllin-treated patients had all three clear (P=0.003).

AIDS-Related Kaposi's Sarcoma
The safety and efficacy of INTRON A in the treatment of Kaposi's Sarcoma (KS), a common manifestation of the Acquired Immune Deficiency Syndrome (AIDS), were eva luated in clinical trials in 144 patients.

In one study, INTRON A doses of 30 million IU/m2 were administered subcutaneously three times per week (TIW) to patients with AIDS-Related KS. Doses were adjusted for patient tolerance. The average weekly dose delivered in the first 4 weeks was 150 million IU; at the end of 12 weeks this averaged 110 million IU/week; and by 24 weeks averaged 75 million IU/week.

Forty-four percent of asymptomatic patients responded vs 7% of symptomatic patients. The median time to response was approximately 2 months and 1 month, respectively, for asymptomatic and symptomatic patients. The median duration of response was approximately 3 months and 1 month, respectively, for the asymptomatic and symptomatic patients. Baseline T4/T8 ratios were 0.46 for responders vs 0.33 for nonresponders.

In another study, INTRON A doses of 35 million IU were administered subcutaneously, daily (QD), for 12 weeks. Maintenance treatment, with every other day dosing (QOD), was continued for up to 1 year in patients achieving antitumor and antiviral responses. The median time to response was 2 months and the median duration of response was 5 months in the asymptomatic patients.

In all studies, the likelihood of response was greatest in patients with relatively intact immune systems as assessed by baseline CD4 counts (interchangeable with T4 counts). Results at doses of 30 million IU/m2 TIW and 35 million IU/QD were subcutaneously similar and are provided together in TABLE 1. This table demonstrates the relationship of response to baseline CD4 count in both asymptomatic and symptomatic patients in the 30 million IU/m2 TIW and the 35 million IU/QD treatment groups.

In the 30 million IU study group, 7% (5/72) of patients were complete responders and 22% (16/72) of the patients were partial responders. The 35 million IU study had 13% (3/23 patients) complete responders and 17% (4/23) partial responders.

For patients who received 30 million IU TIW, the median survival time was longer in pat