It’s pretty relevant considering they both have a very similar goal (anti-inflammatory). Taking both of them together may increase hemophilia (you bleed more when cut). They can also cause certain cardiovascular risks. If your dad has another issue (eg:blood clots) as well, his doctor might have allowed taking both medications because the adverse effects might actually be beneficial.
It’s pretty relevant considering they both have a very similar goal (anti-inflammatory). Taking both of them together may increase hemophilia (you bleed more when cut). They can also cause certain cardiovascular risks. If your dad has another issue (eg:blood clots) as well, his doctor might have allowed taking both medications because the adverse effects might actually be beneficial.