Drugs of Abuse Flashcards
What is the purpose of the misuse of drugs act 1971?
graded to harmfulness attributable to a drug when it is misused
What class of drugs are deemed as the most dangerous?
class A drugs
Give examples of class A drugs
Heroin
LSD
Ecstasy
Cocaine
Give examples of class B drugs
cannabis
barbiturates
ketamine
What class of drugs are supposedly the least harmful class of drugs ?
class C
Give examples of class C drugs
benzodiazepines
buprenorphine
What is the MOA of benzodiazepines?
the potentiate the inhibitory action of GABAa receptors
they are often used as sedatives
they do not have an effect on GABAb receptors
____% of drug related deaths occur in men
74%
____% of drug related deaths occur in women
26%
The 2001 amendment to the misuse of drugs regulations allows for …
lawful possession and supply of controlled (illegal) drugs for legitimate purposes. They cover
-prescribing
-administering
-safe custody
-dispensing
-record keeping
-disposal to prevent diversion for misuse
What is the maximum penalty for possession of a class A drug?
7 years plus a fine
What is the maximum penalty for possession of a class B drug?
5 years plus a fine
What is the maximum penalty for possession of a class C drug?
2 years plus a fine
What is the maximum penalty for supply of a class A drug?
Life + fine
What is the maximum penalty for supply of a class B drug?
14 years + fine
What is the maximum penalty for supply of a class C drug?
14 years + fine
What is the British Pharmacopoeia?
it is the only comprehensive collection of authoritative official standards for pharmaceutical substances and medicinal products
Illicit drugs are not pure, therefore they can contain…
contaminants
diluents
adulterants
What is a contaminant?
these are bi-products of the manufacturing process
What is an adulterant?
it is a pharmacologically active ingredient added to either give synergistic or antagonistic effects
What are diluents?
they are inert substances added to bulk up the drug, decreasing the amount of active ingredient in the drug
Give examples of adulterants used in the 80s
sugar alcohols
mannitol
sorbitol
Give examples of adulterants used in the 2000s
Local anaesthetics
Benzocaine
Lidocaine
They have a numbing effect on the gums
What is dependence?
this is a state in which withdrawal of the drug can cause adverse physiological effects
Physical dependence often leads to …
withdrawal syndrome
Psychological dependence often leads to…
cravings
What class of drug causes the most dependence?
class A drugs which can lead to physical harm
class B drugs have intermediate effect on dependence
class C drugs have the lowest effect on dependence
What are the effects of psychomotor stimulants?
marked effect on mental function and behaviour
produce excitement, euphoria
produces reduced sensation of fatigue
increases motor activity
some can enhance cognitive function
What are the effects of psychomimetic drugs?
they mainly affect thought pattern and perception
they distort cognition in a complex way
Give examples of psychomotor stimulants
Amphetamine (A)- ?? MDMA-is an analogue of amphetamines therefore it is a powerful pscyhomotor stimulant
Cocaine (A)
Cannabis is a psychomimetic and a __________.
psychomotor depressant
Give examples of psyhomimetic drugs
Ecstasy (A)
Ketamine (B)
LSD (A)
Cannabis originates from the plant…
cannabis sativa
Give slang terms for cannabis
weed
herb
pot
grass
bud
ganja
What is a spliff/joint of cannabis?
a rolled cannabis cigaretted; smoked with tobacco
What is hashish/hash?
a black/brown lump made from the plant resin
What is skunk?
they are more potent forms of cannabis, contain more THC
What are synthetic cannaboids?
they are so-called “legal highs”; they act like THC but are often more potent
they have not been banned undet the psychoactive substances act in 2016
What is the main psychoactive component in cannabis?
THC
TetraHydrocannabinol
What are cannabinoids?
There are related compounds that bind to cannabinoid receptors and have similar effect to those produced by cannabis sativa plant
they are a group of compounds that are found in the cannabis plant
What is the first cannabis-based medicine to be licensed in the UK?
Sativex
Nabiximols (US approved name)
In Wales (from 2014), Sativex is NHS funded. True or false
True
Sativex is NHS funded in England. True or false
False
postcode lottery; depends on whee you reside?
What are cannabis extracts?
there are wide range of products generally containing higher levels of cannabinoids than are found in the cannabis plant
Sativex exists in the form of a …
oromucosal spray
cannabis extract
What is the composition of Sativex (oromucosal spray)?
approximate 1:1 ratio of two active cannabinoids
cannabidiol 2.5mg per 1 dose
Dronabinol 2.7mg per 1 dose
What is a pure isomer of THC (tetrahydrocannabinol) ?
Dronabinol
In the BNF, Sativex is listed for specialist use only. What can Sativex be used for?
used as an adjunct in moderate to severe spasticity in multiple sclerosis (MS)
How is Sativex adminisetered?
buccal administration
(oromucosal spray)
What is spasticity?
a symptom of MS
muscles feel stiff, heavy and difficult to move
What are the potential applications of cannbinoid agonists?
Glaucoma to release pressure in eye
Nausea/vomiting associated with cancer chemotherapy
cancer and aids in relation to weight loss
neuopathic pain
head injurt
tourettes syndrome to reduce tics
paskinsons disease to reduce levo-dopa induced involuntary movement
What are the potential applications of cannabinoid antagonists?
obesityy
tobacco dependence
drug addition
alcoholism
Cannabinoids act via which receptor?
cannabinoid receptors
GPCRs
CB1 (cannbinoid 1) receptors are expressed in … and have ______ effects
the CNS ( in the plasma membrane of nerve terminals)
Psychoactive effects
Where are CB2 cannaninoid receptors expressed ?
they are expressed mainly in the periphery- lymphoid, microglia of CNS
expressed in immune system and haematopoietic cells
What is the MOA of cannabinois?
they inhibit adenylate cyclase and calcium channels
they activate potassium channels
they therefore inhibit synaptic transmission
Endogenous ligands of CB receptors (endocannbinoids) include: (name the two)
anandamide
2-arachidonoyl glycerol
they have distinct receptor selectivities (selective to either CB1/CB2 receptors)
What is the function of endocannabinoids?
they have neuromodulatory actions in a wide range of physiological activities
What is the problem with synthetic cannbinoids such as “spice” as opposed to THC (tetrahydrocannabinol) from cannabis ?
synthetic cannabinoids are full agonists of the CB1 receptor
THC from cannabis is a partial agonist
Thus the adverse effects from synthetic cannabinoids are more as they have a greater effect
What are side effects of synthetic cannabinoids?
hypertension
tachycardia
MI
vomiting
hallucinations
psychosis
convulsions
Psychosis induced by synthetic cannabinoids can remain after cessation of use. True or false
True
(from weeks to months)
Withdrawal symptoms from synthetic cannabinoids are not possible. True or false
They are possible