Biological treatments for schizophrenia

Biological treatments target the physical aspects of schizophrenia, a mental health condition characterised by symptoms such as hallucinations (positive symptoms) and social withdrawal (negative symptoms).

Antipsychotic drugs as a biochemical treatment

Antipsychotic drugs are medications designed to balance brain chemicals, particularly dopamine, a neurotransmitter involved in mood and perception. These drugs can be administered orally or via depot injections (long-acting intramuscular injections), with regular medical check-ups to adjust dosages and monitor for side effects. For patients who do not respond well to standard treatments, additional mood-stabilising drugs may be combined with other methods.

Types of antipsychotic drugs:

• Typical antipsychotics (e.g., chlorpromazine) - These work by blocking dopamine receptors in the brain without stimulating them, which reduces excessive dopamine activity. This action primarily helps to alleviate positive symptoms like delusions and hallucinations in around 60% of cases, though negative symptoms often persist.
• Atypical antipsychotics (e.g., clozapine) - These block both dopamine and serotonin receptors, another neurotransmitter linked to mood regulation. They are effective for both positive and negative symptoms and reduce the risk of movement disorders like tardive dyskinesia, but they can cause serious side effects such as agranulocytosis, a dangerous drop in white blood cells.

Treatment plans follow evidence-based guidelines, starting with the most suitable drug based on individual needs.

Electroconvulsive therapy as a biological treatment

Electroconvulsive therapy (ECT) involves delivering controlled electrical pulses to the brain to induce brief seizures, which can help reset neural pathways. It is used as a supplement to medication, not a replacement, particularly for treatment-resistant schizophrenia. Researchers suggest ECT may enhance gene expression and strengthen connections between brain cells, leading to improved symptom management.

Procedure for ECT:

1. Patients are given muscle relaxants to prevent injury and a general anaesthetic to ensure they are unconscious and feel no pain.
2. Electrodes are placed on the scalp, delivering 70–150 volts of electricity for a short duration.
3. This triggers a controlled seizure lasting seconds, which is monitored closely.
4. Sessions typically occur two to three times a week for about one month, followed by maintenance treatments for up to a year.

Psychological treatments for schizophrenia

Psychological treatments address the cognitive and emotional aspects of schizophrenia, helping individuals understand and manage their experiences. These methods emphasise building skills and awareness, often in combination with biological approaches for the best outcomes.

Cognitive-behavioural therapy

Cognitive-behavioural therapy (CBT) is a talking therapy that helps people with schizophrenia by exploring the connections between their thoughts, feelings, and behaviours. Therapists form supportive relationships with clients, encouraging them to take an active role in their recovery. This approach is particularly useful for identifying patterns that trigger symptoms and developing strategies to cope.

Key techniques in CBT for schizophrenia:

• Identifying early warning signs - Clients learn to recognise signals of an upcoming episode, such as increased anxiety, allowing them to use stress management techniques to prevent worsening.
• Challenging delusions - Therapists guide clients to examine whether their beliefs are based on evidence, helping to reduce the impact of hallucinations or paranoid thoughts.
• Thought linkage - This method addresses disorganised thinking by connecting scattered ideas into more coherent patterns.
• Paced activity scheduling - Clients plan daily routines to avoid overload, reducing fatigue and stress that can exacerbate symptoms.
• Keeping symptom diaries - Recording experiences helps track patterns and measure progress over time.
• Psychoeducation - Information about schizophrenia, including its links to stress, is shared with the individual and their family to foster understanding and support.

Key research on treatment efficacy

Research plays a vital role in understanding how well treatments work for schizophrenia. One important study compared psychological approaches to supportive interventions.

Sensky et al. (2000) study

• Aim - This research examined whether cognitive-behavioural therapy (CBT) offers long-term benefits compared to a simpler befriending approach for adults with schizophrenia.
• Participants - Adults diagnosed with schizophrenia from five clinical services across different UK regions.
• Method - Participants were assigned to either CBT or befriending sessions (e.g., casual conversations about hobbies). Each received an average of 19 one-to-one sessions over nine months. Symptoms were measured using standardised scales before treatment, immediately after, and at a nine-month follow-up.
• Results - Both groups experienced reduced symptoms right after treatment. However, only the CBT group showed ongoing improvements at the nine-month follow-up, with sustained reductions in positive and negative symptoms.
• Conclusions - CBT proved more effective in the long term than befriending, suggesting it provides lasting skills for managing schizophrenia beyond just social support.
• Strengths - Including a befriending control group isolated the specific benefits of CBT, ruling out improvements due simply to companionship. The diverse UK sample supports broader generalisability.
• Limitations - All participants were on medication, so it's unclear if CBT works independently. The study's longitudinal design saw 15 dropouts, meaning results may only apply to highly committed individuals who build strong therapist relationships.

Evaluating treatments for schizophrenia

All treatments for schizophrenia have advantages and drawbacks, which must be weighed based on individual needs. Evaluations often draw from meta-analyses, which combine data from multiple studies for reliable insights.

Strengths and weaknesses of biochemical treatments

Strengths and weaknesses of ECT

Strengths and weaknesses of CBT

Issues and debates in schizophrenia treatment

Treatments for schizophrenia raise broader questions about research methods and cultural influences, which affect how we understand and apply these approaches.

Idiographic versus nomothetic approaches

Nomothetic approaches, like meta-analyses, study large groups to identify general patterns, using numerical data from symptom scales for statistical conclusions that can be applied widely. This helps in developing standardised treatments. In contrast, idiographic approaches focus on individual experiences through methods like interviews or case studies, revealing unique factors such as social support or therapist-client bonds that influence treatment success. Combining both provides a fuller picture: nomothetic for broad guidelines, idiographic for personalised care.

Cultural differences in treatment

Cultural attitudes shape treatment preferences and reporting. For example, ECT is viewed controversially in some cultures, like Slovenia, where it's rarely used due to ethical concerns. However, in high power distance index (PDI) cultures like China, more than 50% of schizophrenia patients receive ECT, possibly because unequal patient-doctor dynamics lead to overstated positive reports. These differences highlight the need for culturally sensitive approaches to ensure treatments are effective and accepted globally.