How do you change from a PCR to an antigenic test?

For people with a valid French social security number, the price is the same, so there is no need to change the reservation, you can go directly on site and indicate that you prefer to do an antigenic. For people without a valid social security number, you can send an email to reclamation@loxamed.fr and ask for a refund, so you can re-book with the right test.