International Journal of
Clinical Pharmacology and
Biopharmacy
Sonderdruck
Carlsson C, et al. Int J Clin
Pharmacol Biopharm. 1977.
©
Urban & Schwarzenberg, Inc., Baltimore Printed in the Federal Republic of
Germany The Contributions in this journal are protected by copyright. All
rights reserved. No part of this publication may be reproduced. stored ha Is retrieval system or transmitted in any form or
by any means, electronic, mechanical, photocopying, recording or otherwise,
without the prior written permission of the publisher.
(This document has been sent to me by Dr Carlsson, so there's no
problem of copyright)
_________________________________________________________
Carlsson et al.: Apomorphine
in chronic alcoholics
_________________________________________________________
Apomorphine/Placebo - chronic alcoholics
A
double-blind cross-over study:
apomorphine/placebo in chronic alcoholics
C. Carlsson, P. R. Johansson, B. Gullbergt
Nordhemspolikliniken,
Gothenburg, Sweden
In
a double-blind study in chronic alcoholics apomorphine
was shown to have a significant effect on alcoholic crax
g and on tension. The effect on depression approached, but did not reach,
statistical significance. Theoretical aspects are discussed.
Apomorphine, a dopamine agonist, has been used for 75
years in small non-emetic doses to treat the acute alcohol intoxication phase
of chronic alcoholism. The drug has been claimed to have sedative properties
and to decrease the craving for alcohol [5]; furthermore, it has been used as
an emetic in aversion therapy. Lal and Schlatter [4]
reported that apomorphine decreased the craving for
alcohol when administered to hospitalized patients and recently Buus et al. [1] found in a double-blind study that a group
of alcoholics were statistically significantly more sober the day after apomorphine administration than a similar group receiving chlordiazepoxide or placebo.
Apomorphine is a difficult drug to study. It is rapidly
metabolized by the liver and the dosage required to produce an emetic effect
varies from subject to subject.
In
broad clinical experience we have found that capsules of 20 mg apomorphine in lactose seem to be a good sedative for
chronic alcoholics. Very few alcoholics seem to develop emesis on this dose,
but it appears to have an effect on the craving and tension symptoms. We were
therefore very interested to conduct a double-blind study.
Subjects
Twenty
chronic alcoholics in an open ward in a special alcoholism treatment center
entered the study. They all had passed the abstinence phase. All of them were
chronic alcoholics from the medical point of view (gamma alcoholics according
to the classification of Jellinek) and this implies
alcohol addiction. The age of the patients ranged from 27 to 54 years. All were
voluntary patients and the only other drugs administered were, if necessary,
short-acting sedatives (1 g acetylglycinamidchloral, Ansopal) at night.
Methods
The
study had a double-blind cross-over design. The patients were treated for a
period of 14 days and received either capsules containing lactose (placebo) or
20 mg apomorphine hydrochloride in lactose. One
capsule was given three times a day. After the study a representative sample of
apomorphine capsules were analyzed. The activity was
at least 17.5mg apomorphine. A simple questionnaire
was used each day during the study; each patient was asked four questions about
1 hour after the morning dose:
1.
("Tension") Do you feel more, equally or less nervous today than you
used to do ?
2.
("Depression") Do you feel more, equally or less depressed today than
you used to do ?
3.
("Craving") Do you long more, equally or less for alcohol today than
you used to do ?
4.
("Sleep") Have you slept better, equally or worse tonight than you
used to do ?
Drinking
episodes, side-effects, consumption of sleeping pills were also registered.
The
need of sleeping tablets (acetylglycerinamidchloral 1
g, Ansopal) was greater during the first period than
_________________________________________________________
Side-effect
apomorphine placebo
_________________________________________________________
Nausea
5 3
Vomiting
1 -
Diarrhea
4 2
Vertigo
1 3
Sweating
2 3
Dysphoria
1 1
Tiredness
2 -
Bad
appetite 6 - (pa = 0.016, one-tailed test)
_________________________________________________________
Table 1.
Side-effects, number of reported occurences.
l
Statistic analysis, University of Lund, Sweden.
Int. J. Clin. Pharmacol. 15 (1977), 211-213
211
_________________________________________________________
Carlsson et al.:
Apomorphine in chronic alcoholics
_________________________________________________________
*14 + 14 days. ** + = Improvement, scores. Table 2. comparison of effects of apomorphine or placebo (20 mg 3 times daily) in a
double-blind, cross-over study> of 20 chronic akoholics. |
Lost days
Tension Depression Craving
Sleep Apomorphine,239 days 41 + **112 + 99
+ 97 + 93 Placebo, 246 days 34 + 70 + 62
+ 69 + 99 Statistical analysis Tension : apomorphine better than placebo, p
= 0.048 Depression: apomorphine better than placebo,
p = 0.066 Craving : apomorphine better than placebo, p = 0.012 |
during
the second and about equal for apomorphine and
placebo groups. During the second period statistically significantly more
patients on placebo needed sleeping tablets (p=0.029, Fischer's one-tailed
test). There were few side-effects (Table 1).
Results
The
results are summarized in Table 2. Apomorphine has a
highly significant effect on craving, a significant effect on tension, and the
effect on depression nearly reaches significance.
Discussion
The
results from the present double-blind cross-over study revealed that apomorphine decreased "craving" and tension
significantly and that it had a slight but significant effect on depression.
The lack of difference between effects on sleep could be due to higher
consumption of sleeping tablets in the placebo group. The main purpose was to
investigate the effect of apomorphine on the symptom
of "craving" for alcohol in alcoholics, as phrased by the question:
"Do you long for alcohol more, equally or less today than you used to
do?" Apomorphine does reduce this craving in
chronic alcoholics and thus the present findings are in agreement with those of
earlier studies. It is unlikely that this effect is due to some kind of
aversion therapy. The mode of action of this anti-craving effect of apomorphine remains to be elucidated. It is interesting
that in animal experiments it has been found that apomorphine
in doses which are more or less inactive can block the central stimulant action
of morphine, amphetamine, oor ethanol. There is much
evidence that alcohol has a central stimulant action, resembling amphetamine
(for a review, see [3]). The present study provides further support for such a
hypothesis.
There
is a theory from Walsh and Davies that in the brain an alkaloid, tetrahydropapaveroline, derived from dopamine is formed in
the presence of alcohol.
This
alkaloid is also found in opium and is the precurser
of morphine (Walsh and Davies, 1972). Our finding that apomorphine
has effects on chronic alcoholism could perhaps give some support even to such
theories.
In
an early study Carlsson and Johansson found anxiolytic
effects of propranolol in chronic alcoholics and later Carlsson
and Fasth showed that all significant differences
between propranolol and diazepam were in favor of propranolol in a double-blind
cross-over study in chronic alcoholics. The effect of propranolol and apomorphine may be similar as clinically we have found a
strong potentiation of the hypotensive effect of propranolol by apomorphine. There is a chemical relationship between
transmitter substances in the brain, apomorphine and
propranolol. For a review see [2]. From the practical point of view, apomorphine may be a good drug in the treatment of
alcoholism. There is, however, the theoretical possibility of abuse if the
emetic effect is blocked. In this case apomorphine
may have central stimulating effects and may act on post-synaptic receptors. A
further problem is posed by the rapid metabolism of the drug; occasionally it
is used in Linguletters but this form of
administration cannot conceal the distinctive taste and makes double-blind
studies impossible. It is also unstable and perhaps different results in
different studies are partly due to this. In our study there was a decrease in
activity up 12.5% during the trial; this is somewhat high but was considered
reasonable.
In
the propranolol studies we used more sophisticated questionnaires with many
questions [2]. However, such questionnaires have a strong tendency to measure
how the patients used to be, not how they are at that moment. There is also a
strong tendency to give similar answers to the same questions each time. We
found it better to ask simpler questions more often, in fact daily. We think it
is impossible to conduct a broad study in a few patients due to statistical
difficulties.
Int.
J. Clin. Pharmacol. 15 (1977), 211-213 (No. 5)
212
_________________________________________________________
Carlsson et al.: Apomorphine
in chronic alcoholics
_________________________________________________________
References
1. Buus, S., Christofferssen, A. Nörregaard: Apomorfin anvendt i rus
og abstinensbehandling.
Ugeskr.
Laeg.
136 (1974), 1808.
2. Carlsson, C.: Propranolol in alcoholism: Advances in clin. pharmacol., vol. 12. Urban & Schwarzenberg, Munchen-BerlinWien 1976.
3.
Engel, J., A. Carlsson: Catecholamines
and behaviour. In: Valjelli,
L., W.B. Essman (Ed.): Current developments in
psychopharmacology, vol. 4. Spectrum Publ. Inc., New York 1976.
4.
Lal, S., E. K. E. Schlatter: Treatment of alcoholism
with Dent's oral apomorphine method. Quart. J. Stud. Alc. 33 (1972), 435.
5. Martensen-Larssen, O.: Pers. commun.
1976.
For
the authors: C. Carlsson, Nordkempspolikliniken,
Nordkemsg. 23, 41305 Goteborg, Sweden.
Int.
J. Clin. Pharmacol. 15 (1977), 211-213 (No.5)
213
**********
A Comparison of the Effects of Propranolol and
Diazepam in Alcoholics
by Carl Carlsson M.D.
and Bengt-Goran Fasth Ph.D.
Documents from Doctor Carl Carlsson / Documents du docteur Carl Carlsson
Interzone Academy 2011: Interzone economy - Medical research
The Western Lands + Interzone Creations + La sémantique générale pour tous + Interzone Galleries + Interzone News + THE INTERZONE COFFEE HOUSE + Interzone Editions + Interzone reports + Interzone CD1 + Pour une économie non-aristotélicienne - Bienvenue à Interzone