Comments on Non-Supersymmetric Orientifolds at Strong Coupling

We consider several properties of a set of anti-D$p$-branes in the presence of orientifold p-planes in type II theory. This system breaks all the supersymmetries of the theory, but is free of tachyons. In particular, we center on the case of a single anti-D$p$-brane stuck at a negatively charged orientifold p-plane, and study its strong coupling behaviour for p=2,3,4. Interestingly enough, as the coupling increases the system undergoes a phase transition where an additional antibrane is created. We conclude with some remarks on the limit of large number of antibranes on top of orientifold planes.