Alcohol and drugs

Questions:

• How much alcohol can I drink and not be over the limit?
• I go out on a weekend and 'binge' drink, does this mean I have a drink problem?
• I have got a drug problem, where can I get some help?
• I know an off-licence that is selling alcohol to underage children, what can I do?
• I think my child/friend is drinking too much, what can I do?
• I think my friend/teenage child is taking drugs, what can I do?
• Is cannabis legal?
• Kids keep going to a neighbour's house who is supplying them with alcohol and they are getting drunk, what can be done about this?
• What is the law relating to selling cigarettes?
• What should I do if I find a hypodermic needle?