Chapter 10: CNS Depressants Drugs and Behavior
Antidepressants are defined by their effect on mood, not on general brain activity, so they form an orthogonal category of drugs. Treatment facilities will tailor treatment plans to the individual and include different types of therapies to help the patient replace negative behaviors with healthier ones. Cognitive behavioral therapy (CBT) is particularly helpful in treating CNS depressant abuse. This type of therapy focuses on modifying a patient’s thinking, expectations, and behaviors while simultaneously increasing their skills for coping with various life stressors.
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Chronic alcohol use can also lead to dependence, addiction, and withdrawal symptoms when attempting to stop usage of the drug. The overuse of depressants can lead to symptoms of CNS depression, including slowed reflexes, lightheadedness, fatigue, and difficulty breathing. Depressants affect GABA, an inhibitory neurotransmitter that slows down activity in the brain.
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- As time goes on, users begin to exhibit symptoms similar to alcohol intoxication, including reduced inhibitions, impaired motor coordination, and slurred speech.
- While opioids are considered extremely effective for treating pain, they are also some of the most addictive and dangerous drugs in the world.
- Taken together, these findings support the notion that alcohol and prescription drug co-use could be playing a significant role in current alcohol-related morbidity and mortality in the United States.
- Inhalants often are allosteric modulators of GABAA receptors as well as antagonists at glutamate NMDA receptors.
At high levels of dependence, these symptoms are exacerbated, and withdrawal may involve convulsions, hallucinations, delirium, cardiovascular collapse, and death. Treatment for barbiturate dependence involves detoxification and gradual reduction in symptoms of dependence. Fortunately, the withdrawal symptoms can be suppressed by safer sedative-hypnotic drugs like benzodiazepines. It quickly became the first popular psychotropic drug in America, becoming popular in Hollywood and gaining fame for its seemingly miraculous effects. It has since been marketed under more than 100 trade names, including Amepromat, Quivet, and Zirpon.
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This results in a relaxing and depressant effect on the central nervous system. If you are on CNS depressants and suspect it’s making you more lethargic than you should be, don’t stop it until you speak to your doctor. However, if you find stages of sobriety alcohol that your CNS depressants affect your daily functioning, speak to your doctor about it. They’ll decide if you need to be taken off the medication, switched to another form of the medication, or if your dosage needs to be adjusted.
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Aside from alcohol, we will also find sedatives and hypnotics in this category. Since they share similar functions and many sedatives cause hypnotic effects at higher doses (and vice-versa), they are usually referred to as a single class of drug, sedative-hypnotics. Examples of CNS depressants include tranquilizers, hypnotics, and sedatives. In recent years, doctors have prescribed opioid painkillers for many conditions, but overuse of these drugs can lead to problems. Severe adverse effects may occur when BZDs are administered with other drugs such as opioids.
Symptoms of Central Nervous System Depression
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Doing so can help minimize the risk for dependence; although dependence may still occur if you take the medication for an extended period of time. Sometimes people misuse these medications intentionally, but dependence can also occur after taking these medications as prescribed for an extended period. Many CNS depressants work by increasing the activity of the neurotransmitter known as gamma-aminobutyric acid (GABA). Like other neurotransmitters, GABA carries messages from one cell to another. By increasing GABA activity, brain activity is reduced, leading to a relaxing effect.
If you have a condition that requires medication, you’ll need to follow your doctor’s instructions for care. If you’ve become addicted to alcohol or drugs, you’ll need to safely withdrawal from the chemicals and commit to long-term treatment for addiction. It is an endogenous substance that can also be taken as a medication or used recreationally. Although it primarily acts as a depressant, it causes biphasic effects, with stimulatory effects occurring at low doses or for a short time initially. Intermediate-acting barbiturates used as sedative-hypnotics can induce sleep.
Treatment for SUD is available through counseling and supportive medications. As indicated by the name, inhalants are administered by inhaling the substance over some time at high concentrations. GHB is an endogenous neurotransmitter that is synthesized does water flush alcohol out of urine in GABA neurons. There appears to be a dynamic relationship between GHB and GABA in that each is a precursor as well as a by-product of the other. Opioids refer to all natural, semisynthetic, and synthetic opioids, like heroin and oxycodone.
A study investigating the prescription of opioids and BZD in veterans showed an increased risk of overdose death in veterans who have prescriptions for both BZD and opioids at the same time [50]. The dose of BZD given also positively correlated with increased risk of an overdose death [50]. In general, benzodiazepines are safe and effective in the short term, although cognitive impairments and paradoxical effects such as aggression or behavioral disinhibition occasionally occur. A minority of patients react to benzodiazepines with paradoxical agitation.
Preexisting disease processes and age-related changes affect elimination half-life, an especially important consideration when administering BZDs. Elimination half-life is the time necessary for plasma concentration of a drug to decrease to 50% during the elimination phase. Because elimination half-life is directly proportional whippets balloons to the volume of distribution and inversely proportional to its clearance, renal and hepatic disease (altered volume of distribution and/or clearance) affect elimination half-life. GABA is the most common neurotransmitter in the central nervous system, found in high concentrations in the cortex and limbic system.
This effect occurs because many BZDs are relatively slowly eliminated from the body because of their lipophilic properties, and they accumulate in fatty tissues. As a result, a patient taking a typical standard dose may suffer significant memory loss. The patient may be unable to recognize loved ones and/or friends and may have difficulty remembering significant portions of his or her life, sometimes as much as several years. Cognitive impairment may also limit the patient’s ability to work effectively as well. Among those who drink regularly, the prevalence of prescribed sedative-hypnotic use increased and prescribed opioid use remained common.
If you or someone you know is misusing CNS depressants, help is available. You can contact your doctor or speak with a counselor to gain support through treatment. For the last chapter in this unit, we will take a detailed look at alcohol, the most infamous depressant of all.
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