Liposomal Lurtotecan Plus Cisplatin in Treating Patients With Advanced or Metastatic Solid Tumors

DISEASE CHARACTERISTICS: Histologically or cytologically confirmed advanced and/or metastatic solid tumor refractory to standard curative therapy or for which no curative therapy exists Clinically or radiographically documented disease No tumor marker elevation as only evidence of disease No untreated brain or meningeal metastases Previously treated and stable CNS metastases allowed (i.e., no evidence of increasing disease by CT scan for at least 4 weeks) Recommended phase II dose portion of study: Previously untreated advanced and/or metastatic disease for which a cisplatin-based regimen is indicated (e.g., non-small cell lung cancer, small cell lung cancer, ovarian, or head and neck cancer) At least one measurable lesion at least 20 mm by physical exam or x-ray or at least 10 mm by spiral CT scan PATIENT CHARACTERISTICS: Age: 18 and over Performance status: ECOG 0-2 Life expectancy: Not specified Hematopoietic: Absolute granulocyte count at least 1,500/mm3 Platelet count at least 100,000/mm3 Hepatic: Bilirubin no greater than upper limit of normal (ULN) AST/ALT no greater than 2.5 times ULN (5 times ULN if documented liver metastases) Renal: Creatinine no greater than ULN OR Creatinine clearance at least 60 mL/min Other: No greater than grade 1 neuropathy or ototoxicity No other prior or concurrent malignancy within the past 5 years except curatively treated basal or squamous cell skin cancer or cervical cancer (for recommended phase II dose) No active or uncontrolled infections No other serious illnesses or medical conditions that would preclude study No known hypersensitivity to systemic liposomal formulation or any drug chemically related to study drug Not pregnant or nursing Negative pregnancy test Fertile patients must use effective contraception PRIOR CONCURRENT THERAPY: Biologic therapy: See Chemotherapy Recovered from prior immunotherapy Chemotherapy: See Disease Characteristics No more than 1 prior chemotherapy regimen (adjuvant and/or metastatic) except for nonmyelosuppressive agents (e.g., signal transduction inhibitors or immunotherapy) At least 3 weeks since prior chemotherapy (6 weeks for nitrosoureas and mitomycin and 4 weeks for carboplatin) and recovered At least 1 year since prior high-dose chemotherapy with marrow or stem cell support No prior total cisplatin dose of more than 300 mg/m2 No prior chemotherapy (for recommended phase II dose) Endocrine therapy: Prior hormonal therapy allowed Radiotherapy: At least 4 weeks since prior radiotherapy and recovered No prior radiotherapy to more than 25% of bone marrow reserve, except for low-dose nonmyelosuppression Surgery: Not specified Other: At least 4 weeks since other prior experimental drugs or anticancer therapy and recovered No other concurrent investigational or anticancer therapy