What class of medications do Fluoxetine and Sertraline belong to?

Fluoxetine and Sertraline are categorized as Selective Serotonin Reuptake Inhibitors (SSRIs). This class of medications primarily functions by increasing serotonin levels in the brain, which can help improve mood, emotional balance, and anxiety levels. SSRIs work by blocking the reabsorption (or reuptake) of serotonin into neurons, making more serotonin available in the synaptic space, thus enhancing neurotransmission. This mechanism is particularly effective in treating depression and anxiety disorders.

In contrast, the other medication classes listed do not perform the same function. Tricyclic Antidepressants, for instance, affect several neurotransmitter systems and can have a broader range of side effects due to their less selective mechanism. Monoamine Oxidase Inhibitors work by inhibiting the enzyme monoamine oxidase, which breaks down neurotransmitters, thus also increasing their availability but through a different pathway. Sodium Channel Blockers are typically used in the treatment of conditions like epilepsy and certain heart conditions, rather than for the treatment of depression or anxiety. This specificity and mechanism of action is key to understanding why Fluoxetine and Sertraline fit firmly in the SSRI category.