Wiktionary
hard pill to swallow
alt. (context idiomatic English) Something that is difficult to accept. n. (context idiomatic English) Something that is difficult to accept.
Usage examples of "hard pill to swallow".
It's a hard pill to swallow, but in the end, harder for them to eat&mdash.
It's a hard pill to swallow, but in the end, harder for them to eat—.
It's a hard pill to swallow, but in the end, harder for them to eat -- assuming our political leadership allows us to do the right thing.