Question

class of antidepressant drugs that increases availability of serotonin by interfering with its reuptake
selective dihydrofolate reductase inhibitors (ssris)
selective xanthine oxidase inhibitors (ssris)
selective serotonin reuptake inhibitors (ssris)

Explanation:

SSRIs (selective serotonin reuptake inhibitors) are a class of antidepressant drugs. Their mechanism of action involves interfering with the reuptake of serotonin. This leads to an increase in the availability of serotonin in the synaptic cleft, which helps in improving mood and treating depression. Selective dihydrofolate reductase inhibitors are used in the treatment of infections (e.g., some antimalarial drugs act on dihydrofolate reductase). Selective xanthine oxidase inhibitors are used to treat conditions like gout (e.g., allopurinol inhibits xanthine oxidase to reduce uric acid production).

Answer:

selective serotonin reuptake inhibitors (SSRIs)