A new study will enroll AIDS patients with PCP who have not responded to
standard treatments (trimethoprim/sulfamethoxazole and parenteral
pentamidine) within 14 days or who have failed to respond to one for at
least seven days and have developed serious reactions to the other. The
patients will take trimetrexate, which under the "Treatment IND" protocol
was previously available only to those with serious reactions to both
approved drugs. The new study is uncontrolled. The National Institute
of Allergy and Infectious Diseases and trimetrexate manufacturer
Warner-Lambert Co. are conducting two approved, multicenter studies for
patients with the disease who have not responded well to one of the
treatments, but have not had serious adverse reactions to the other. Two
other studies will compare the new drug with the approved therapies as
initial treatments.