The website you should look at if you take a drug

http://www.thennt.com/

In Summary, for those who took the statin for 5 years:

As %

Benefits in Percentage

• 96% saw no benefit
• 1.2% were helped by being saved from death
• 2.6% were helped by preventing a repeat heart attack
• 0.8% were helped by preventing a stroke

Harms in Percentage

• 2% were harmed by developing diabetes**
• 10% were harmed by muscle damage

*The development of diabetes is one such unanticipated harm found in a recent large study and it seems likely therefore that this applies to the data above, although this is a best guess.

As NNT 

Benefits in NNT

• 1 in 83 were helped (life saved)
• 1 in 39 were helped (preventing non-fatal heart attack)
• 1 in 125 were helped (preventing stroke)

Harms in NNT

• 1 in 50 were harmed (develop diabetes*)
• 1 in 10 were harmed (muscle damage)