I agree with Joey. I hear that stuff isn’t recommended for use anymore. You should be able to buy it over the counter at almost any pharmacy though. Good luck on your experiment.
It’s available over the counter without a prescription. If your experiement is on humans, you may want to take note of these points from the Northern New England Poison Center:
“Why not recommend ipecac now?
* Ipecac may not help.
* Ipecac may delay other more effective treatments for poisoning.
* Ipecac can worsen poisoning in some cases (acids, gasoline, lamp oil, others).
* Ipecac is unsafe if given often (for weight loss, misuse by parents).”