Will emergency contraceptive pills such as i-pills or unwanted 72 work on a girl of 16 years?

Yes. But, if you are going to have sex at the age of 16 years old - you need to be responsible enough to use protection every time (if not ready to bring a life into this world).
Yes. If taken in the recommended time frame of 72 hours, they will work for any age woman about 94% of the time.

Related Questions

Can a 21 year old girl take emergency contraceptive pills?

Yes, but.. Yes, but you should seek the advice of your physician before doing so. There are many potential side effects to these medications and they may or may not be advised depending on your specific circumstances. Read more...