Pharmacology of antidepressants

Pharmacology of Antidepressants

The Pharmacology of Antidepressants refers to the study of the biochemical and physiological effects of antidepressants on the human body. Antidepressants are a class of drugs used to treat depression and other mental health disorders. They work by balancing chemicals in the brain called neurotransmitters that affect mood and emotions.

Mechanism of Action

Antidepressants work by altering the balance of certain chemicals in the brain, primarily serotonin, norepinephrine, and dopamine. These neurotransmitters are involved in regulating mood, energy level, feelings of well-being, and response to stress.

Selective Serotonin Reuptake Inhibitors (SSRIs)

Selective Serotonin Reuptake Inhibitors (SSRIs) are a class of antidepressants that increase the amount of serotonin in the brain by blocking its reuptake into the presynaptic cell. This increases the level of serotonin available to bind to the postsynaptic receptor, which leads to a reduction in the symptoms of depression.

Serotonin and Norepinephrine Reuptake Inhibitors (SNRIs)

Serotonin and Norepinephrine Reuptake Inhibitors (SNRIs) work by increasing the levels of serotonin and norepinephrine in the brain by inhibiting their reuptake into the presynaptic cell.

Tricyclic Antidepressants (TCAs)

Tricyclic Antidepressants (TCAs) work by blocking the reuptake of norepinephrine and serotonin, increasing the concentration of these neurotransmitters in the brain.

Side Effects

Common side effects of antidepressants include nausea, weight gain, sexual dysfunction, fatigue, insomnia, dry mouth, blurred vision, and constipation. It's important to note that not all patients will experience these side effects, and they often decrease over time.

Drug Interactions

Antidepressants can interact with a variety of other medications, including other antidepressants, antipsychotics, mood stabilizers, and certain types of pain medication. It's important to discuss all medications and supplements with a healthcare provider before starting an antidepressant.

See Also

• Depression
• Neurotransmitters
• Serotonin
• Norepinephrine
• Dopamine