Researchers have discovered that the synthetic drug MDPV, with the street name “bath salts,” can leave users struggling with the effects for days.

Carla Murphy, from Altoona, PA, has been charged with smoking the synthetic drug known as “bath salts” in the maternity ward of a central Pennsylvania hospital.

After a spate of so-called face-eating zombie attacks, bath salts have recently been outlawed, but that doesn’t stop some stores from selling different drugs that produce the same effects.

A New York woman, allegedly high on “bath salts”, was killed after police tasered her. Onlookers photographed Pamela McCarthy, who was attacking her three-year-old son.

"Bath salts" and other innocent-sounding products on the shelves of "head shops" and other stores in Ireland are giving an increasing number of people a legal high, with the same buzz that comes from alcohol and illegal drugs — but without a hangover.