The effects may last a week, and
the skin may desquamate.
=Primula obconica= is another plant which, when handled, gives rise to
an acute dermatitis of an erysipelatous character. The face swells, and
large blisters form on the cheeks and chin.
XXIX.--OPIUM AND MORPHINE
=Opium.=--The inspissated juice of the unripe capsules of the _Papaver
somniferum_. As a poison it is generally taken in the form of the
tincture (laudanum), which contains 1 grain opium in 15 minims. Opium is
found in almost all so-called 'soothing syrups' for children, and in
Godfrey's cordial, Dalby's carminative, and Collis Browne's chlorodyne.
Laudanum contains 1 per cent. morphine, and it, along with all other
preparations (_e.g._, paregoric) which contain 1 or more per cent.
morphine, are included in Part I. of the Schedule of Poisons, and come
under the Dangerous Drugs Regulations.
The most important active principles of opium are the alkaloids morphine
and codeine.
_Symptoms_ usually commence in from twenty to thirty minutes: Giddiness,
drowsiness and stupor, followed by insensibility. Patient seems asleep;
may be roused by loud noise, but quickly relapses.
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