 New Hampshire does not have any documented regulation pertaining to the purchase of dextromethorphan available at this time.New Jersey Assembly Bill 622 states that a person will not directly or indirectly sell or offer to sell any product containing any amount of dextromethorphan to a person under the age of 18.The bill then goes on to state the defenses a provider of dextromethorphan could use in the event that they are in violation of the bill.