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Central Nervous System Depressants

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Presentation on theme: "Central Nervous System Depressants"— Presentation transcript:

1 Central Nervous System Depressants
Alcohol Barbiturates Benzodiazepines Prescription Medications

2 CNS Depressants (prescription)
Valium Librium Ativan Serax Xanax Tranzene Klonopin

3 General Symptoms of Users
“Drunken” Behavior (lack of coordination, slurred speech, staggering Confusion Faulty Judgment Emotional Lability Irritability Drowsiness Hostility Paranoid ideas

4 Route of Administration
Orally – pill (capsule or tablet) Or mixed with water and injected

5 Potential for moderate to high dependence
Physical Dependence Potential for moderate to high dependence

6 Tolerance Low to Moderate

7 Psychological Dependence
Moderate to High Potential

8 Withdrawal Must be monitored closely due to potential fatalities
Risk of seizures and delirium tremens Prolonged symptoms can last for months, resolve, then reappear. Especially with Benzodiazepines (Valium, Librium, Tranzene, and Zanax).

9 Depressant Withdrawal – Stage I
Tremors (shakes) occur in the morning after heavy use the night before Peak intensity is about hours after last dose “Jitters”, irritability, nausea, vomiting, easily startled, facial flushing, rapid heart rate Loss of appetite insomnia, inattention, mildly disoriented, poor recent memory, sense of uneasiness.

10 CNS Depressant Withdrawal Stage II
Hallucinations (disordered perceptions) vary in intensity misinterpreted shadows and movements Objects seeming distorted and unreal May occur when the rest of the sensorium is clear, and seem intensely real.

11 CNS Depressant Withdrawal Stage III
Seizures (grand mal) Bursts of 2-6 full body seizures 90% occur 7-48 hours after the last drink One third of patients with seizures will go on to develop delirium tremens

12 CNS Depressant Withdrawal Stage IV
Delirium Tremens (Profound Confusion, Delusions, Vivid Hallucinations, Tremor, Agitation, Sleeplessness, Dilated Pupils, Fever, Tachycardia, Profuse Perspiration Usually occurs 3-5 Days after the last dose Most cases mild, and end abruptly Severe cases considered a medical emergency, and carry a 15% fatality rate Single episode lasts 72 hours or less in 80% of the cases

13 Pharmacological Effects Alcohol (Ethanol):

14 Alcohol as a drug Alcohol is a psychoactive drug that is a CNS depressant Alcohol is the second most widely used and abuse of all psychoactive drugs Q. What drug is the most widely used and abused drug? A. Caffeine

15 Four types of alcohol Methyl alcohol Isopropyl alcohol poisonous
Ethylene glycol poisonous Ethanol drinking alcohol

16 Physical effects of alcohol
The body is affected by alcohol in two ways: Direct contact with mouth, esophagus, stomach, and intestine Influence on almost every organ system in the body after entering the bloodstream

17 Physical Effects of Alcohol
Absorption is the process in which the drug molecules reach the bloodstream The effects of alcohol on the human body depend on the amount of alcohol in the blood (BAC)

18 Physical effects of alcohol
BAC produced depends on the: 1. Presence of food in the stomach 2. Rate of alcohol consumption 3. Concentration of alcohol 4. Drinker’s body composition Alcohol beverages have almost no vitamins, mineral, protein, or fat - just large amount of carbohydrates

19 Physical effects of alcohol
Alcohol can cause severe physical and psychological dependence 1. Cross-tolerance 2. Behavioral tolerance compensation of motor impairments by chronic alcohol users through behavioral pattern modification

20 Blood alcohol level Almost 95% of the consumed alcohol is inactivated by liver metabolism. The liver metabolizes alcohol at a slow and constant rate and is unaffected by the amount ingested. Thus, if on can of beer is consumed each hour, the blood alcohol level (BAL) will remain constant.

21 Blood alcohol level Blood alcohol level (BAL) is the concentration of alcohol expressed as a percentage.

22 How alcohol is absorbed in the body

23 Short-term effects of alcohol
Low to moderate doses Disinhibition Social setting and mental state Euphoric, friendly, talkative Aggressive and hostile Interfere with motor activity, reflexes, and coordination

24 Short-term effects of alcohol
Moderate quantities Slightly increases in heart rate Slightly dilates blood vessels in arms, legs, skin Moderately lowers blood pressure Stimulate appetite Increases production of gastric secretions Increases urine output

25 Short-term effects of alcohol
At higher doses Difficulty in walking, talking, and thinking Induces drowsiness and cause sleep In large amounts - severe depression of the brain systems and motor control area of the brain

26 Large Doses of Alcohol Uncoordination, confusion, & disorientation Stupor, anesthesia, coma, and even death Lethal level of alcohol is between 0.4 and 0.6% by volume in the blood

27 ? True of False ? Drinking black coffee, taking a cold shower, or breathing pure oxygen will hasten the sobering up process The type of alcohol beverage you drink can influence the hangover that results Taking an aspirin-caffeine combination before drinking helps the sobering up process and the chances of having a hangover

28 Long-term effects of alcohol
Light or moderate drinking does little permanent harm (exception - FAS) Heavy drinking Seriously damages the heart Kidney and liver damage Mental disorders, irreversible damage to the brain and peripheral nervous system Lowers resistance to pneumonia and other infectious diseases Irritates the gastrointestinal tract

29 Principal control centers of the brain affected by alcohol

30 Alcohol and pregnancy Women who are alcoholics or who drink heavily during pregnancy have a higher rate of spontaneous abortion. Infants born to drinking mothers have a high probability of being afflicted with fetal alcohol syndrome.

31 Effects of alcohol on organ systems and bodily functions
Brain and nervous system Liver hepatotoxic effect alcoholic hepatitis cirrhosis Digestive system

32 Effects of alcohol on organ systems and bodily functions
Blood Cardiovascular system alcoholic cardiomyopathy Sexual organs Endocrine system

33 Effects of alcohol on organ systems and bodily functions
Kidneys Mental disorder and damage to the brain Wernicke-korsakorr’s syndrome The fetus (FAS) Malnutrition

34 Barbiturates Derivatives of barbituric acid First synthesized in 1868
Used as anticonvulsants and sedative hypnotics High abuse liability High lethal dose rate

35 Barbiturates Used with other analgesic combinations (aspirin, codeine) for treatment of tension and migraine headaches Phenobarbital and belladonna alkaloid combinations used to treat peptic ulcers and irritable bowel syndrome

36 Barbiturates - Medical Uses
Used as an anticonvulsant Sedative Hypnotic Detoxification medication for alcohol withdrawal syndrome


38 Route of Administration
Oral (pill form) Intravenous Intramuscular (shot)

39 Barbiturates - Short Term Effects
Relieve anxiety and restlessness, relax muscles, induce sleep Reduce lung function (breathing), heart action, speech, and movement

40 Long-Term Effects Cardiovascular – bradycardia, hypertension
Digestive System – nausea, vomiting, constipation Nervous System – agitation, confusion, hyperkinesia, ataxia, CNS depression, nightmares, nervousness, psychiatric disturbance, hallucination, insomnia, anxiety, dizziness, thinking abnormalities

41 Barbiturate – Long Term Effects
Reproductive System – cross the placental barrier and cause fetal abnormalities Newborn withdrawal symptoms Respiratory System – hypoventilation, apnea Other Reactions - headache, injection site reactions, fever, liver damage, megablastic anemia (with long term use)

42 Tolerance Develops quickly
Psychological tolerance develops more quickly than physical Increased amounts approach lethal dosage Metabolize faster in the liver as dosage increases

43 Half Life Psychoactive chemicals have age dependent metabolism
Younger people tolerate a higher dose than older (over 50). Half life = length of time in hours required for one half of the dose taken to be excreted from the body.

44 Toxicity/Overdose Cold, clammy skin Weak, rapid, shallow breathing
Combined with ETOH –suppression of respiratory center of brain Dependence defined by amounts taken 8-10 times normal taken daily for 30 days Death will occur if drowsiness, loss of consciousness, depressed breathing, and coma are left untreated.

45 Psychological Effects
Early - calming, tension reduction, Middle – Euphoria, hypnotizing, impaired judgment, sense of “no worry” Later – mood swings, depression, irritability, obnoxious behavior, manipulation, drug seeking

46 Withdrawal from Sedative Hypnotics
Within 6-8 hours of last dose Can be life threatening if breathing and blood pressure problems untreated Nausea, vomiting, increased heart rate, excessive sweating, abdominal cramps, tremors Withdrawal deaths more frequent than overdose deaths.

47 National Institute of Drug Abuse
References - Material from this module was Developed from the following sources, which are recommended reading for the LADAC exam: Basics Of Addiction Counseling: Desk Reference And Study Guide National Association for Addiction Professionals National Institute of Drug Abuse National Institute of Alcohol Abuse and Alcoholism

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