For drugs that are off patent protection, yes. These would basically be public service announcement, which do exist, although some folks would like to see more.

For drugs that are off patent protection, yes. These would basically be public service announcement, which do exist, although some folks would like to see more. On the other hand, private philanthropic organizations also play this role to some extent, urging various screening, etc. For things on patent protection, the argument would be that companies are better positioned than the government, for the same reason that most net-positive ads for non-medical goods are made privately.