Excepient change in batch formula

if we changed excepient in formula, then its need to do validation ???

There are FDA guides which address the issue of changing excipient quantity

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Dear Sir,

As i know for change in Vendor supplier ( change in manufacturer) we do the Process validation , if we change the one of excepient of formula , then must be validation done for that product .

pls comment on my point .

See the FDA SUPAC Guidance documents, they include the answers

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Yes change of excipients is also validated