What is the ruling on eating non-halal meat in France to maintain complete sterilization after a transplant operation, especially if it is not pork?

A Muslim must seek out what is lawful and good in their food and avoid what is forbidden, for the default rule concerning slaughtered animals is prohibition unless they are slaughtered according to Islamic law. If you ate meats that were slaughtered in a manner not prescribed by Islamic law, you have committed a sin for which repentance and seeking forgiveness are necessary. You should have sought a lawful alternative, such as fish and vegetables.

However, if you found no alternative and were compelled to eat it, then there is no blame upon you, as Allah Almighty says: "And He has detailed for you what He has forbidden you, excepting that to which you are compelled." This applies to both mentioned cases as long as the state of compulsion exists. Uttering the Name of Allah (Tasmiyah) before eating is a Sunnah, and seeking forgiveness is required, but these do not make the forbidden permissible.