The Multi-Jurisdiction Problem
For most biotech companies, global regulatory strategy means sequencing: file with FDA first, then EMA, then other jurisdictions, each 12-18 months behind the last. The reasoning is intuitive — you learn from FDA's review, you incorporate those learnings, you resubmit regionally adapted versions.
The problem is that this sequential model adds years to global access. If FDA review takes 12 months and you start EMA six months after FDA submission, you add 12 months of EMA review plus six months of sequential gap — 18 months before patients in Europe have access to a medicine that's already approved in the US.
For the patients waiting, those months are not abstract.
Why simultaneous filing isn't standard
Three structural barriers prevent most companies from filing simultaneously:
1. Different data package requirements. FDA and EMA have substantive differences in what they require — not just formatting, but study designs, endpoints, and statistical approaches they find acceptable. Companies that designed their trials primarily to satisfy FDA often find they're missing data EMA needs.
2. Dossier format differences. The eCTD structure is nominally harmonized via ICH, but regional requirements for specific sections differ. A dossier formatted for FDA submission isn't ready for EMA without significant adaptation work.
3. Translation and localization. Non-English regulatory submissions require accurate translation of clinical and scientific content — work that has historically been slow and expensive.
What AI changes
AI doesn't eliminate the need for regionally compliant submissions, but it dramatically reduces the labor cost of producing them. Translation of technical regulatory content has become fast and high-quality. Regional format adaptation — taking an FDA-formatted section and restructuring it for EMA requirements — is increasingly automatable.
This means the question is no longer "can we afford to file simultaneously?" It's "what's our strategy for designing data packages that satisfy multiple agencies simultaneously?"