A Compassionate Treatment Protocol for the Use of Trimetrexate Glucuronate (Neutrexin) With Leucovorin Protection for European Adult Patients (>= 13 Years Old) With Pneumocystis Carinii Pneumonia

Inclusion Criteria

Patients must have:

• Pneumocystis carinii pneumonia (PCP) confirmed within 15 days prior to study entry.
• Serious intolerance and/or resistance to standard therapies (such as trimethoprim/sulfamethoxazole and parenteral pentamidine) during the course of therapy for the current episode of PCP, OR a documented history of such intolerance during a prior episode.
• Consent of parent or guardian if less than 18 years of age.

Exclusion Criteria

Patients with the following prior conditions are excluded:

History of Type I hypersensitivity (i.e., urticaria, angioedema, or anaphylaxis), exfoliative dermatitis, or other life-threatening reactions due to trimetrexate glucuronate.