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Biological Psychology – Biological Treatments for Bipolar Disorder
What are the biological treatments for bipolar disorder?
Answer:
The biological treatments for the depressive episodes of bipolar disorder are similar to those used for major depressive disorder. However, additional treatments are needed to reduce the symptoms of mania. The main biological treatments include:
  • Lithium
  • Carbamazepine
  • Antidepressants
These medications help stabilise mood, reduce manic episodes, and manage depressive symptoms.


Why is medication adherence difficult in bipolar disorder?
Answer:
Individuals with bipolar disorder may find it difficult to take their medication consistently because:
  • They may forget to take their medication, especially during manic episodes.
  • Some individuals choose not to take their medication because they miss the elevated mood and increased energy associated with mania.
Poor medication adherence increases the risk of relapse and recurrence of manic or depressive episodes.


What is Lithium?
Answer:
Lithium carbonate is a mood stabiliser commonly used to treat bipolar disorder.
It:
  • Is more effective at treating mania than depression.
  • Helps stabilise mood.
  • Can reduce the cycle of manic episodes.
  • Once mania is controlled, depressive symptoms often improve as well.


What are the side effects of Lithium?
Answer:
Although Lithium is effective, it may cause several side effects, particularly at high or toxic doses.
Common side effects include:
  • Significant weight gain
  • Increased thirst
  • Hypothyroidism
  • Motor incoordination
  • Confusion
In cases of overdose, Lithium can cause:
  • Medical coma
Regular monitoring of Lithium levels is important because the difference between a therapeutic and toxic dose is small.


What is Carbamazepine?
Answer:
Carbamazepine is a mood stabiliser that reduces the excitability of neurons.
It:
  • Helps reduce mania.
  • May also reduce depressive symptoms in some individuals.
  • Stabilises mood by decreasing excessive neuronal activity.


What are the side effects of Carbamazepine?
Answer:
Carbamazepine may:
  • Interact or compete with other medications and chemicals in the body.
  • Cause anaemia, which reduces the number of healthy red blood cells.
Patients taking Carbamazepine require regular medical monitoring.


How are antidepressants used to treat bipolar disorder?
Answer:
The antidepressants used to treat major depressive disorder can also be prescribed to manage the depressive episodes of bipolar disorder.
Their purpose is to:
  • Reduce depressive symptoms.
  • Improve mood during depressive episodes.
However, antidepressants are often used carefully and usually alongside a mood stabiliser because they may increase the risk of triggering a manic episode if used alone.


Are pharmacological treatments addictive?
Answer:
Yes. Pharmacological treatments can lead to dependence with long-term use.
If medication is stopped too quickly, individuals may experience:
  • Withdrawal symptoms
  • Increased risk of relapse
Therefore, medications should only be discontinued gradually under medical supervision.


What are the main biological treatments for bipolar disorder?
Answer (Note Form):
Lithium
  • Mood stabiliser.
  • More effective for mania than depression.
  • Helps break the bipolar cycle.
  • Depressive symptoms often improve after mania is controlled.
Side effects:
  • Weight gain
  • Increased thirst
  • Hypothyroidism
  • Motor incoordination
  • Confusion
  • Toxic overdose may cause medical coma


Carbamazepine
  • Mood stabiliser.
  • Reduces neuronal excitability.
  • Treats both mania and depression in some individuals.
Side effects:
  • May interact with other medications.
  • Can cause anaemia.


Antidepressants
  • Used to treat depressive episodes of bipolar disorder.
  • Same antidepressants used for major depression.
  • Usually prescribed with a mood stabiliser to reduce the risk of triggering mania.


What are the important considerations when treating bipolar disorder?
Answer (Note Form):
  • Patients may:
    • Forget medication during manic episodes.
    • Stop medication because they miss the elevated mood of mania.
  • Pharmacological treatments may cause:
    • Dependence (addiction).
    • Withdrawal symptoms if stopped suddenly.
  • Medication should always be taken as prescribed and discontinued gradually under medical supervision.


Conclusion
Biological treatment for bipolar disorder primarily involves mood stabilisers and antidepressants. Lithium is the most commonly used mood stabiliser and is particularly effective in controlling manic episodes, while Carbamazepine reduces neuronal excitability and may treat both mania and depression. Antidepressants are used to manage depressive episodes but are usually combined with mood stabilisers to reduce the risk of triggering mania. Although these medications are effective, they may cause significant side effects, including weight gain, hypothyroidism, anaemia, confusion, and, in severe cases, medical coma. Patients with bipolar disorder may also struggle with medication adherence because they miss the elevated mood associated with mania, and stopping medication too quickly can result in withdrawal symptoms and relapse. Therefore, careful monitoring and long-term treatment are essential for effective management of bipolar disorder.

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