N-Nitroso Betahistine formation

Hello Dear,
Greetings!

Betahistine tablet contains Betahistine DiHCl as API with secondary amine functional group. Is there any reported case of Nitrosamine formation in this product?

Thank you in Advance.

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it is listed in appendix 1 of the EMA guideline with a limit of 18ng

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Thank you, Andy.
I appreciate your quick answer.