Phenobarbiturates overdose

I was reviewing some interesting cases with the residents this morning. A case caught our attention. This was a gentleman who came in the emergency room for phenobarbiturates overdose. We also found that this patient has a recurrent history of phenobarbiturates overdose. He usually comes in and gets admitted for a few days after he is stable, but this happens again and again. What happened here?

Vitamin D and our world 維生素D 的故事

Vitamin D has become a very hot topic in recent years. There are so much information available on the internet. Vitamin D can be naturally obtained through exposure to the sun, because of this reason, it is believed that people live north of 42 degrees latitude don't get enough natural Vitamin D. Do you think people live in the tropical region get enough Vitamin D from the sun?