I was with one of my old friends yesterday and he was addicted to football gambling to the extent that he is finding it very difficult to sleep and do normal activities. He has won some of betting he has played on but correctly want to give it some time off. He is asking for general advice if drugs can help.
Drugs will not be able to stop someone's addiction without a strong desire to quit from that person...
if your friends don't make losses and mess like creating debts or harming family during betting then it's not a bad thing, all you need to do is help him manage his emotions and addictions, give him your best advice as a friend.