Product & company record

UPDATED FEB 2026

Pfizer Depo-Provera Lawsuit

Part of the Depo-Provera Brain Tumor investigation

The short answer

Pfizer inherited Depo-Provera when it acquired Pharmacia & Upjohn in 2002. Despite international warnings dating to 2015, Pfizer did not add a U.S. meningioma warning until December 2025.

Plaintiffs allege a pattern of delayed safety action prioritizing revenue over patient safety.

People's Justice Research TeamUpdated February 20, 2026Fact-checked

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Who Is Pfizer?

Pfizer Inc. is one of the world's largest pharmaceutical companies with 2024 revenue exceeding $58 billion. Pfizer acquired Pharmacia Corporation in 2002, inheriting the Depo-Provera brand and all associated liabilities. The original developer was Upjohn Company, which first sought FDA approval in 1967.

The Corporate History of Depo-Provera

Upjohn developed medroxyprogesterone acetate (MPA) as a contraceptive in the 1960s. After three FDA rejections (1967, 1978, 1983), approval came in 1992. Upjohn merged with Swedish company Pharmacia in 1995, forming Pharmacia & Upjohn. Pfizer acquired the combined company in 2002, gaining full control over Depo-Provera manufacturing and labeling.

The Failure-to-Warn Timeline

Canada added a meningioma warning to Depo-Provera in 2015. The EMA required warnings in 2024. Pfizer submitted a U.S. label supplement to the FDA in February 2024 — but the FDA rejected it. Pfizer resubmitted in June 2025 and the FDA approved the meningioma warning in December 2025. Plaintiffs argue Pfizer could have voluntarily updated the U.S. label through the CBE pathway at any time without FDA pre-approval.

The Revenue Motive

Although Depo-Provera is not Pfizer's largest product, it generates substantial revenue as a widely-prescribed contraceptive with no generic competition for decades. Adding a brain tumor warning could significantly reduce prescriptions — creating a financial incentive to delay label updates. The decade-long gap between international and U.S. warnings is central to the punitive damages argument.

On the record

Brand Names & Products

PfizerDepo-ProveraPharmacia & Upjohn

Research & evidence

Scientific Evidence

Medroxyprogesterone Acetate and Meningioma: A Global Issue

Roland N, Froelich S, Weill A (2025). Frontiers in Global Womens Health

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Use of High-Dose Medroxyprogesterone Acetate and Risk of Intracranial Meningioma

Roland N, Neumann A, Hoisnard L, Gagne JJ, Froelich S, Weill A (2024). The BMJ

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The Association between Medroxyprogesterone Acetate Exposure and Meningioma

Griffin BR et al. (2024). Cancers

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FAQ

Frequently Asked Questions

37 QUESTIONS

Studies show that long-term use of Depo-Provera significantly increases the risk of meningioma — a tumor in the tissue surrounding the brain. The risk ranges from 1.5x to 5.6x depending on duration of use and the study population. Meningiomas express progesterone receptors at 60–80% rates, and the synthetic progestin in Depo-Provera (MPA) stimulates tumor growth by binding to these receptors.

Dive deeper

Related Guides

7 GUIDES

The full investigation

Part of the Depo-Provera Brain Tumor Investigation