Mike Penning, Minister of State at the Home Office, opened the debate. Lyn Brown, Shadow Minister for the Home Office, responded on behalf of the Opposition.
The Bill passed second reading without a division and will now be considered in a Public Bill Committee.
Summary of the Psychoactive Substances Bill
A Bill to make provision about psychoactive substances; and for connected purposes.
Progress of the Bill
The Bill was introduced to the House of Lords on 28 May 2015. It completed its Lords stages on 20 July 2015 and was introduced to the Commons with first reading on 21 July 2015.
Keep up to date with all the proceedings and documentation, including amendment papers, on the Psychoactive Substances Bill and find out how a Bill becomes an Act of Parliament.
House of Commons Library analysis
The House of Commons Library produces briefing papers to inform MPs and their staff of key issues. The papers contain factual information and a range of opinions on each subject, and aim to be politically impartial.
The Library has published a briefing paper for second reading.
What happens at second reading?
At second reading the House debates the whole principle of the Bill. It usually takes place no sooner than two weekends after first reading.
The Member in charge or the Minister moves the motion 'that the Bill be now read a second time'. MPs then debate the Bill. At the end of the debate the Speaker determines whether there are any objections to the motion being debated and asks for the Ayes and Noes.
Members voice their opinion, and if no objections are made, the Bill passes second reading without a vote. If the Speaker believes Members have voiced disagreement, a division is called and a vote taken.
What happens after second reading?
The Bill will now be considered by a Public Bill Committee, which is scheduled to conclude by Thursday 29 October 2015, but could finish earlier.
The programme motion also schedules the report and third reading stages to take place over one day.
Watching proceedings from the public gallery
UK residents and overseas visitors can watch proceedings in the House of Commons by visiting the public gallery.
This article was produced by the Commons Digital Outreach Team. Follow the @HouseofCommons on Twitter for updates on the UK House of Commons Chamber.