Poppers, amyl nitrite, butyl nitrite, isobutyl nitrite.

Product names include: Ram, Thrust, Rock Hard, Kix, TNT, Liquid Gold.

Clear or straw-coloured liquid in a small bottle vapour which is breathed in through the mouth or nose from a small bottle or tube.

• brief but intense ‘head-rush’;

• flushed face and neck;

• effects fade after 2 to 5 minutes.

• headache, feeling faint and sick;

• regular use can cause skin problems around the mouth and nose;

• dangerous for people with anaemia, glaucoma, and breathing or heart problems;

• if spilled, can burn the skin;

• may be fatal if swallowed.