Mirena Lawsuit: IUD Migration, Pseudotumor Cerebri & Injury Claims

IUD Migration and Embedment Claims

Mirena is a T-shaped plastic device inserted into the uterus to provide long-term contraception. Migration claims allege that Mirena moves from its proper position in the uterine cavity, perforating the uterine wall and embedding in surrounding tissues or migrating into the abdominal cavity. This migration, when it occurs, typically requires laparoscopic surgery for removal.

Plaintiffs allege Bayer failed to adequately warn prescribing physicians and patients about the risk of migration, the factors that increase migration risk (such as insertion timing relative to breastfeeding), and the signs that migration may have occurred. Symptoms of migration including unusual pain, failure of the device to be palpable at checkup, and changes in menstrual pattern are alleged to have been inadequately described in Mirena's labeling.

Pseudotumor Cerebri (Intracranial Hypertension) Claims

A separate category of Mirena claims involves pseudotumor cerebri, also called idiopathic intracranial hypertension (IIH) -- a condition where pressure in the brain increases without a tumor being present, causing severe headaches, vision problems, and in serious cases permanent vision loss. Plaintiffs allege that Mirena's hormonal component (levonorgestrel) can cause or contribute to elevated intracranial pressure.

IIH was added to Mirena's US labeling in 2017 following review of adverse event reports. The lawsuits allege that Bayer was aware of this risk earlier but delayed adding the warning, and that even the 2017 warning was inadequately specific about the risk's magnitude and onset. Women who developed IIH symptoms after Mirena insertion and before the 2017 warning update may have particularly strong claims.

Mirena Litigation Structure

Mirena migration claims and IIH claims have been consolidated in separate federal MDLs. The migration MDL in the Southern District of New York has been active for years with mixed outcomes in bellwether trials. The IIH litigation is in an earlier stage. Bayer has settled some individual claims while contesting others.

Settlement values in resolved migration cases have varied significantly based on the surgical intervention required, complications, and fertility impacts. IIH cases with permanent vision loss command higher values. Related: Erb's Palsy Lawsuit Settlement Amounts.

Who Qualifies for the Mirena Lawsuit

Women who: had Mirena inserted; experienced IUD migration requiring surgery for removal; or developed symptoms consistent with intracranial hypertension (severe headaches, vision changes, pulsatile tinnitus) after insertion -- may qualify. Medical documentation of the device position, any surgical procedures, and IIH diagnosis is essential. Related: Paragard copper IUD injury claims.

Given the MDL structure, new cases can still be filed. Statutes of limitations vary but generally run from the date of discovery of the injury.

Status 2026

Both Mirena MDLs are active. Bayer continues to defend against both migration and IIH claims. No global settlement has been announced. Individual cases continue to be filed and resolved through the MDL process.

How to Get Legal Help

If you believe you qualify based on the eligibility criteria described above, the next step is a free consultation with an experienced attorney. Most plaintiff-side attorneys handling these cases work on contingency -- meaning you pay nothing unless your case results in a recovery. Bring any relevant documentation including receipts, correspondence, or evidence of the harm you experienced.

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