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Tamsulosin (Flomax) was originally marketed by Astellas Pharma but was made by Yamanouchi Pharmaceuticals. Astellas Pharma acquired Yamanouchi Pharmaceuticals and thus now owns the rights to Flomax. However since the Flomax patent expired in 2009, the generic Tamsulosin is made by multiple generic companies worldwide.

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11y ago
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Q: What drug company makes flomax?
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