| Course | PAC 330 Substance Abuse |
|---|---|
| Module | Module 1 |
| Paper type | Substance fundamentals paper |
| Length | About 1,063 words, 6 pages |
| Format | APA 7 student paper |
| School | Aspen University |
| Program | Psychology and Addiction Studies |
| Updated | October 2026 |
Free sample paper for PAC 330 Module 1
Different Doors, Same Room: Mechanisms, Harms and Burden Across the Substances Counselors Will See
Student Name
Psychology and Addiction Studies Program, Aspen University
PAC 330: Substance Abuse
Instructor Name
Month Day, Year
Different Doors, Same Room: Mechanisms, Harms and Burden Across the Substances Counselors Will See
Prairie Hope Recovery, an outpatient program in Omaha, Nebraska, created for this course, treats several hundred clients a year. In a typical week, its counselors see people whose primary substance is alcohol, methamphetamine, opioids, cannabis or nicotine, and many who use more than one. New counselors often arrive with strong training in counseling and little in pharmacology. This paper is written as a section of their orientation guide, explaining the fundamentals of substance use disorders and how the major substances compare. Prairie Hope and its staff are fictional; the research is real.
A Shared Pathway
Volkow et al. (2019) reviewed decades of research on how addictive drugs affect the brain. All addictive drugs increase dopamine in the nucleus accumbens, part of the brain's reward system, though they do so in different ways. Stimulants such as cocaine and methamphetamine act directly on dopamine terminals, blocking reuptake or releasing dopamine. Opioids act on mu opioid receptors, reducing the activity of neurons that normally restrain dopamine cells. Alcohol, nicotine and cannabis act through their own receptor systems, which in turn increase dopamine release. The faster a drug raises dopamine, the more rewarding and the more addictive it tends to be, which is why smoking or injecting a drug produces stronger effects than swallowing it.
With repeated use, the brain adapts. Cues associated with drug use come to trigger dopamine release and craving on their own. The reward system becomes less responsive to ordinary rewards, partly through reduced dopamine receptors, leaving people feeling flat without the drug. Stress systems become more active during withdrawal. And regions of the prefrontal cortex that support self-control function less well. These changes help explain why people continue using despite harm and why relapse is common.
How the Classes Differ
| Class | Main mechanism | Intoxication | Withdrawal | Main medical risks |
|---|---|---|---|---|
| Alcohol | Enhances GABA, inhibits glutamate | Relaxation, disinhibition, impaired coordination | Tremor, sweating, anxiety; can include seizures and delirium | Liver disease, cancers, injuries, heart disease |
| Opioids | Mu opioid receptor agonists | Euphoria, sedation, pain relief | Aches, sweating, diarrhea, intense craving; rarely dangerous itself | Overdose with respiratory depression |
| Stimulants | Increase dopamine and norepinephrine | Energy, euphoria, alertness | Fatigue, low mood, increased sleep and appetite | Heart attack, stroke, psychosis |
| Cannabis | Acts on cannabinoid receptors | Relaxation, altered perception, impaired memory | Irritability, sleep problems, reduced appetite | Impaired driving; psychosis risk in vulnerable users |
| Nicotine | Acts on nicotinic acetylcholine receptors | Mild stimulation, reduced tension | Irritability, difficulty concentrating, increased appetite | From smoked tobacco: cancers, lung and heart disease |
| Sedatives such as benzodiazepines | Enhance GABA | Calm, sedation | Anxiety, insomnia; can include seizures | Overdose, especially combined with opioids or alcohol |
Ranking Harms
Nutt et al. (2010) asked a panel of experts to score twenty drugs on sixteen criteria of harm, nine concerning harm to users, such as death, damage to health and dependence, and seven concerning harm to others, such as crime, family adversity and economic cost. Using a formal decision analysis that weighted each criterion, they produced overall harm scores. Alcohol ranked as the most harmful drug overall, largely because of its harm to others, followed by heroin and crack cocaine. When only harm to users was considered, heroin, crack cocaine and methamphetamine ranked highest. The authors argued that legal status did not match harm. The ranking reflects expert judgment in a British context rather than direct measurement, but it shows that harm has many dimensions.
The Global Burden
Degenhardt and Hall (2012) reviewed the extent of illicit drug use and dependence worldwide and estimated their contribution to the global burden of disease. Tens of millions of people were estimated to be dependent on cannabis, amphetamines, cocaine or opioids. Illicit drug use contributed a meaningful share of global disease burden through dependence, overdose, infectious diseases transmitted by injection, suicide and injuries. Opioids accounted for the largest share of that burden among illicit drugs, because of overdose and injection-related disease. The authors noted that alcohol and tobacco together caused far more burden than all illicit drugs combined.
Polysubstance Use
Many Prairie Hope clients use more than one substance, and the combinations matter as much as any single drug. Alcohol taken with opioids or benzodiazepines compounds respiratory depression, and most opioid overdose deaths involve another substance. Stimulants are increasingly contaminated with fentanyl, so a client who thinks of himself as a methamphetamine user may face opioid overdose risk without knowing it. Nicotine use is common among people with other substance use disorders and contributes heavily to their long-term mortality. A substance history that asks only about the primary drug misses these risks, and a treatment plan built on it may address the wrong danger.
Guidance for Reading a Substance History
The science has direct implications for how counselors take a substance history. First, ask about route of use, since smoking or injecting raises addiction risk and, for injection, infection risk. Second, ask about combinations, especially opioids with alcohol or benzodiazepines, which greatly increase overdose risk. Third, ask about withdrawal history, since past seizures or delirium from alcohol or sedatives signal the need for medical withdrawal management. Fourth, ask about nicotine, which many programs overlook despite its harm. Fifth, remember that medications exist for some disorders, such as opioid and alcohol use disorders, and not yet for others, which shapes treatment planning.
What Counselors Do Not Need to Know
New counselors sometimes worry that they must master pharmacology to be effective. They do not need to know receptor subtypes or dosing schedules; those belong to prescribers. What they need is enough understanding to ask the right questions, recognize danger, such as signs of complicated withdrawal or overdose risk, and explain to clients in plain language why their cravings persist and why some treatments involve medication. That level of understanding, drawn from the sources in this guide, makes counseling more accurate and more credible to clients who often know a great deal about the drugs they use.
Conclusion
Substances differ in how they act, what withdrawal looks like and what harms they cause, but all reach the brain's reward system. Volkow, Michaelides and Baler explain that shared pathway and the changes repeated use produces, Nutt, King and Phillips show that harm has many dimensions and does not follow legal status and Degenhardt and Hall place drug use within the global burden of disease. For Prairie Hope's counselors, these fundamentals become better questions and safer care.
References
Degenhardt, L., & Hall, W. (2012). Extent of illicit drug use and dependence, and their contribution to the global burden of disease. The Lancet, 379(9810), 55-70. https://doi.org/10.1016/S0140-6736(11)61138-0
Nutt, D. J., King, L. A., & Phillips, L. D. (2010). Drug harms in the UK: A multicriteria decision analysis. The Lancet, 376(9752), 1558-1565. https://doi.org/10.1016/S0140-6736(10)61462-6
Volkow, N. D., Michaelides, M., & Baler, R. (2019). The neuroscience of drug reward and addiction. Physiological Reviews, 99(4), 2115-2140. https://doi.org/10.1152/physrev.00014.2018
PAC 330 Module 1 instructions, in plain terms
PAC 330 starts with fundamentals, and the first-module paper generally asks you to explain what substance use disorders are and how the main classes of substances act on the body and brain. Use Aspen's posted Module 1 instructions as your guide; the program here is invented. Explain the shared reward mechanism and what repeated use changes. Describe how major drug classes act, with accurate pharmacology. Compare classes on intoxication, withdrawal and risks. Present evidence on relative harms and population burden. Draw practical implications for counselors. Cite every source in APA 7, and check each pharmacological claim against your sources rather than memory. Compare classes on the same features so differences are visible. Write for readers who know counseling but not pharmacology.
How the PAC 330 Module 1 example is put together
Prairie Hope's counselors see alcohol, opioids, methamphetamine, cannabis and nicotine every week. Volkow, Michaelides and Baler's Physiological Reviews article explains how stimulants, opioids, alcohol, nicotine and cannabis each raise dopamine and why fast delivery matters. A six-row table compares classes on mechanism, intoxication, withdrawal and major medical risks. Nutt, King and Phillips's Lancet analysis shows how drugs rank on harm to users and to others, with alcohol highest overall. Degenhardt and Hall's Lancet review places illicit drugs in the global burden of disease, with opioids contributing most. Guidance covers asking about route, frequency, combinations and withdrawal history, which matter for both risk and treatment.
PAC 330 Module 1 rubric: what earns full marks
Fundamentals papers earn credit for accurate pharmacology, clear comparisons and practical relevance. This example explains a shared mechanism without implying that all drugs are the same, then shows their differences in a table. It reports the harm rankings with their method, a decision analysis by experts, so readers understand what the ranking does and does not show. The burden estimates place clinic experience in a global context. The guidance for counselors turns pharmacology into interview questions, such as asking about combinations, which shows why the science matters in practice. The writing stays plain enough for new staff to use. A closing section sets realistic limits on what counselors need to know.
PAC 330 Module 1 help: mistakes that cost marks
Students often describe drugs with inaccurate or outdated pharmacology. Check mechanisms against current reviews. Another weakness is treating all substances as identical; they share a reward pathway but differ in withdrawal, risks and treatments. Present harm rankings with their method and limits. Distinguish harm to users from harm to others. Use burden estimates to give context. Connect the science to practice, such as how route of use changes risk. Avoid sensational language. Note where medications exist for some substances and not others, since that difference shapes treatment. Keep tables consistent so each class is compared on the same features. Mention nicotine, which programs often overlook.
Write yours, or have the desk draft it
This paper is an original model document written by our desk, not a submitted student paper and not an official Aspen University document. Read it for the moves, then write your own to the instructions in your classroom. If you want one built to your exact prompt and rubric, the first custom sample is free and arrives in 24 to 48 hours.
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PAC 330 Module 1 questions, answered
What does PAC 330 Module 1 usually ask for?
Aspen's PAC 330 begins with the fundamentals of substance use disorders, so explaining how major substances act and how they compare is typical. Read your Module 1 prompt.
How do addictive drugs affect the brain?
Volkow, Michaelides and Baler describe all addictive drugs as raising dopamine in the brain's reward system, through different routes, with repeated use changing the system over time.
Which drug is the most harmful?
Nutt, King and Phillips ranked alcohol the most harmful overall when harm to others was included, while heroin, crack cocaine and methamphetamine were most harmful to users.
Where can I find a free PAC 330 Module 1 sample paper?
Read the whole paper above: mechanisms, harms and burden across substance classes, with a comparison table and guidance for counselors.
Which drugs cause the most disease burden worldwide?
Degenhardt and Hall found that among illicit drugs, opioids contributed the largest share of the global disease burden.