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What is Morphine?

Morphine is an opioid anesthetic that is used for moderate to severe acute and chronic pain relief and pain management. It can be taken orally or injected and is typically only administered by healthcare professionals. 

Morphine affects the neurotransmitters and opioid receptors in the brain responsible for regulating dopamine levels in the body. The active ingredient in morphine is derived from the opium plant, which has been widely used throughout history as a pain remedy.

31860838 close up of morphine vial

Physical and psychological dependence are major concerns with taking morphine as it is frequently misused, or abused, often leading to addiction.  

Side Effects & Risks of Morphine 

A major risk of using morphine is developing an addiction or physical dependency. When used as prescribed, people taking morphine may experience only mild side effects that are not typically hazardous. 

However, if morphine is misused, especially over a long period of time, the risk of developing potentially dangerous side effects greatly increases.  

Common side effects can include:

  • Nausea 
  • Vomiting
  • Constipation
  • Loss of appetite
  • Lower blood pressure
  • Lowered body temperature
  • Difficulty urinating
  • Drowsiness 
  • Dizziness 
  • Confusion
  • Nervousness
  • Weakness
  • Sleepiness or sedation
  • Inability to concentrate 
  • Changes in heart rate 
  • Respiratory depression 
  • Dry mouth
  • Feelings of calmness, euphoria, or a false sense of well being 

Long term use or abuse can lead to more serious side effects, including:

  • Increased blood sugar levels 
  • Chronic stomach pain
  • Bloating and stomach acid reflux
  • Severe weight loss 
  • Decreased sexual drive and sexual dysfunction
  • Immune system disturbances
  • Chest pain 
  • Hallucinations 

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Why is Morphine Dangerous?

Morphine use is dangerous because it can be highly addictive. Mixing morphine with other central nervous system (CNS) depressants, such as alcohol, can greatly increase the risk of overdose and even death. 

Tolerance to morphine increases the longer you take it, eventually leading to larger quantities to get the desired effects. Often cheaper alternatives are sought in order to be able to afford increased quantities. This increases the risk of developing a physical dependence and the potential for overdose. 

When taken as prescribed or under medical supervision, morphine is not generally considered dangerous. 

Opioid use, misuse, and addiction have become a growing problem in the United States. Some individuals who are addicted to morphine resort to “street alternatives” to continue substance use after prescriptions run out. Resources and services have been put in place to help combat this serious issue. 

Can Someone Overdose on Morphine? 

It is possible to overdose on morphine. Intentional or accidental overdoses can occur when taking this medication. This is especially true if taking more than what has been prescribed by a doctor or qualified healthcare professional. 

Some factors that can increase the risk of overdose: 

  • Certain underlying health conditions 
  • Mixing morphine with other CNS depressants, such as alcohol or benzodiazepines 
  • Misuse or use of the drug 
  • Taking more than the prescribed amount 

How Much Morphine Do You Have to Take to Overdose?

It usually takes about 200 milligrams of morphine to cause an overdose, though there have been extreme cases where this can happen with as little as 60 milligrams. A normal dose of morphine is between 20 - 30 milligrams.

While it is possible to overdose, the amount of morphine needed for this to occur depends on a variety of factors. Some of these factors include the patient’s specific condition, underlying health issues, and tolerance level to the drug. 

Another major factor affecting the amount of morphine needed to overdose is if other depressant substances or alcohol are present in the bloodstream.

Overdoses can happen quickly even when taking morphine as prescribed, though this is much less common. Most overdoses occur when the drug is being used without a prescription.   

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Symptoms of Morphine Overdose 

Morphine overdose may be obvious or difficult to detect. Sometimes it may appear that a patient is sleeping when in fact they have overdosed. For this reason, it is imperative to recognize the other signs and symptoms of an overdose to know when to call for immediate assistance. 

These symptoms that should be monitored include:

  • Loss of consciousness
  • Limp body that is unresponsive to outside stimulus
  • Slow, shallow, or erratic breathing
  • Stopped breathing
  • Faint or hard to detect pulse
  • Change in skin tone
  • Extremely pale or clammy face 
  • Choking or gurgling sounds 
  • Vomiting

When to Visit the Emergency Department (ED) 

If a person is experiencing any of the symptoms listed above, call 911 or seek urgent medical care. If you know someone who has been misusing or using morphine or appears to be experiencing any concerning side effects do not hesitate to seek medical help. 

Opioids act on the central nervous system of the body, therefore an overdose on morphine can cause a person's breathing to slow to the point of coma, respiratory failure, and even death. If you suspect someone is overdosing, a visit to the ED is necessary and can be life-saving. 

Treatment for an Opioid Overdose 

With basic life support and proper medical attention, the effects of an overdose can sometimes be reversed. However, it is imperative to treat overdoses as soon as possible after they occur to give the best chance of recovery. It is also largely dependent on how severe the overdose is when determining the likelihood of making a full recovery. 

Treatment for an opioid overdose is typically administered with an antidote such as Naloxone. This is typically only administered by healthcare professionals, but more people are beginning to carry a naloxone pen (nasal spray) for emergency use due to the ongoing opioid crisis. 

It is important to note that anyone who is going to administer this life-saving shot must be properly trained on how to do so safely and effectively. 

Resuscitation or CPR may also be needed to treat a person who has overdosed on opioids. Specific cases may require specific treatments that can only be carried out by a doctor or trained healthcare professional. 

Treatment for Morphine Abuse/Addiction

Dependency on morphine can happen quickly. When a patient suffering from morphine addiction stops taking this substance they will experience withdrawal symptoms, which are typically very hard to deal with and often dangerous. 

Medical detox is the best starting place to treat morphine addiction. Trained professionals can help to ease the unpleasant symptoms of withdrawal by administering a naloxone infusion, methadone, or other opioid antagonists. Detox measures help cleanse the body of morphine,  eliminating physical dependency on it to function. 

The next step in the recovery process typically involves inpatient treatment and counselling. This can help to address mental health and behavioral issues relating to misuse or addiction. Treatment of high-dose intrathecal morphine overdose requires a more intense approach.

Overcoming an opiate addiction can be extremely challenging, but recovery is possible with the right steps. Treating addiction is often a lifelong battle. Having a strong support system helps to decrease the chances of relapse. 

If you are concerned that you or a loved one is struggling with morphine addiction, or other opioid addiction, seek immediate medical help from a doctor or healthcare professional.

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Resources

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Murphy PB, Bechmann S, Barrett MJ. Morphine. [Updated 2020 May 30]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2021 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK526115/

National Center for Biotechnology Information (2021). PubChem Compound Summary for CID 5288826, Morphine. Retrieved February 27, 2021 from https://pubchem.ncbi.nlm.nih.gov/compound/Morphine.

Maier C, Hildebrandt J, Klinger R, Henrich-Eberl C, Lindena G; MONTAS Study Group. Morphine responsiveness, efficacy and tolerability in patients with chronic non-tumor associated pain - results of a double-blind placebo-controlled trial (MONTAS). Pain. 2002 Jun;97(3):223-233. doi: 10.1016/S0304-3959(02)00020-9. PMID: 12044619. https://pubmed.ncbi.nlm.nih.gov/12044619/

Gálvez R, Pérez C. Is morphine still the best reference opioid? Pain Manag. 2012 Jan;2(1):33-45. doi: 10.2217/pmt.11.78. PMID: 24654616. https://pubmed.ncbi.nlm.nih.gov/24654616/

Brown, J., Setnik, B., Lee, K., Cleveland, J. M., Roland, C. L., Wase, L., & Webster, L. (2011). Effectiveness and safety of morphine sulfate extended-release capsules in patients with chronic, moderate-to-severe pain in a primary care setting. Journal of pain research, 4, 373–384. https://doi.org/10.2147/JPR.S23024

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