I personally distrust dentists more than doctors, however I had a rather negative experience with one last year. My dad had been late to pick me up from school to take me to a doctors appointment at the clinic. I was about twenty minutes late and I was taken to that waiting room. I think I heard someone ask if she was on her lunch and could see me. While I was waiting the doctor, she finally comes in and I was talking to someone on my cell phone. She said "You need to put it away since you were late to your appointment." I waited about three seconds longer and she said "You really need to hang up now." in a very terse tone. I'm thinking 'What are you, my mother?' I had to end up hanging up on the person because she didn't even give me enough time to say 'bye'. Seriously, the impression I was given was 'Hurry up, so I can get back to my lunch please.' She gave a quick answer to the problem I was having with my glands before sending me off. Not worth the $35 I paid for the visit. Not my fault my dad forgot to take me to the appointment. I had to walk home after that appointment too. >_<
I agree with what some of you said about doctors proscribing medication on a whim. I've known people with similar situations where it was like 'Oh, you have problems paying attention in school? That means you have ADD or ADHD!' and have given a misdiagnosis just to get them out of there. I mean did they ever consider the problem could be family related or emotional problems at home? No.