Caran, he doesn’t have to keep taking them. The point is that it gives you a tiny dose of nicotine in a safer form...you can also get mint type things and a mouth spray, also of course patches. Is he going it alone or is he doing it with NHS support. If he’s getting support then he can go back and ask them for help but as I understand it, (never smoked myself) the idea is to only use whatever you use to control the nicotine cravings and then gradually reduce. The amount you use (subject to a safe maximum) is up to the user.