Would merging old content of the same subject help?

[blackout17]

I run a drug addiction website, the early days of my website where it was just a blog, I did some posts about drugs but I split them up for example;

What is Heroin - 200 words
Effects of Heroin - 200 words
Facts on Heroin - 200 words

Would it be wise to merge them and make one big article, improve it for SEO etc due to the new panda update requiring better articles and due to me been a rookie in the past it was pretty useless on the searches anyways!

[franberries]

IMO, it is just fine as long as you write according to SEO rules and make sure you do correctly on page SEO before you target some keyword for ranking purposes