<s>[INST] What are the action mechanisms of the main drugs for treating osteoporosis? [/INST] Antiresorptive treatments act on bone-degrading cells (osteoclasts) and decrease their activity through different mechanisms. While the bone-forming treatment has a direct effect on the cells that create bone (osteoblasts) and increases their activity.  Source: Clinic Barcelona. Link: https://www.clinicbarcelona.org/en/assistance/diseases/osteoporosis/frequently-asked-questions. Field: Rheumatology. Disease: Ostoeporosis </s>