Biomedical Therapies: Drug Treatments and Technological Methods

16.3 Biomedical Therapies

Drug Treatments

Drug treatments are a primary form of biomedical therapy used to manage and alleviate symptoms of psychological disorders. These treatments involve the use of medications that affect brain chemistry and neural functioning.

• Psychopharmacology: The study of how drugs affect mood, perception, thinking, and behavior.

• Common Drug Classes:

  • Antidepressants: Used to treat depression and anxiety disorders. Examples include selective serotonin reuptake inhibitors (SSRIs) and tricyclic antidepressants.

  • Antipsychotics: Used to manage symptoms of schizophrenia and other psychotic disorders. They often target dopamine pathways in the brain.

  • Anxiolytics: Medications that reduce anxiety, such as benzodiazepines.

  • Mood Stabilizers: Used primarily for bipolar disorder to control mood swings (e.g., lithium).

• Mechanisms of Action: Most psychiatric medications work by altering neurotransmitter activity in the brain, either by increasing or decreasing the availability of certain chemicals.

Example: SSRIs like fluoxetine (Prozac) increase serotonin levels in the brain, which can help alleviate symptoms of depression.

Working the Scientific Literacy Model: Using MDMA (Ecstasy) to Treat Posttraumatic Stress Disorder (PTSD)

Recent research has explored the use of MDMA (3,4-methylenedioxymethamphetamine), commonly known as ecstasy, as an adjunct to psychotherapy for individuals with Posttraumatic Stress Disorder (PTSD).

• Scientific Literacy Model: This model emphasizes evaluating the quality of evidence, understanding research methods, and considering ethical implications in psychological science.

• MDMA-Assisted Psychotherapy: MDMA is administered in a controlled clinical setting to help patients process traumatic memories with reduced fear and anxiety.

• Research Findings: Clinical trials have shown promising results, with some patients experiencing significant reductions in PTSD symptoms.

• Risks and Considerations: MDMA has potential side effects and risks, including neurotoxicity and abuse potential, so its use is carefully regulated in research settings.

Example: In a randomized controlled trial, participants receiving MDMA-assisted therapy showed greater improvement in PTSD symptoms compared to those receiving placebo plus therapy.

Additional info: MDMA is not yet approved for general clinical use in treating PTSD, but ongoing research may influence future treatment guidelines.

Technological and Surgical Methods

In addition to drug treatments, biomedical therapies can include technological and surgical interventions for severe or treatment-resistant psychological disorders.

• Electroconvulsive Therapy (ECT): A procedure in which controlled electrical currents are passed through the brain to induce brief seizures, often used for severe depression unresponsive to other treatments.

• Repetitive Transcranial Magnetic Stimulation (rTMS): Uses magnetic fields to stimulate nerve cells in the brain, typically used for depression.

• Deep Brain Stimulation (DBS): Involves surgically implanting electrodes in specific brain areas to modulate neural activity, used experimentally for depression and obsessive-compulsive disorder (OCD).

• Psychosurgery: Rarely used today, but historically included procedures like lobotomy. Modern psychosurgery is highly targeted and used only in extreme cases.

Example: ECT is often effective for patients with severe, treatment-resistant depression, though it may cause short-term memory loss as a side effect.

Additional info: Technological and surgical methods are typically considered only after other treatments have failed, due to their invasive nature and potential risks.