To dream of pills or tablets represents issues that need to be accepted or ideas that need to be "swallowed." A person or situation may be forcing you accept a new rules, new facts, or challenging current beliefs.
To dream of blue pills represent truth that needs to be accepted. A person or situation may be revealing the truth to you that's may be difficult to accept.
Example: A young man dreamed of seeing someone swallow a pill. In waking life he was having anxiety about having to tell a girl he liked something personal about himself and having her accept it.
*Please See Medicine