A 75-year-old woman is admitted following a fall and found to have sustained a fractured neck of femur. She has a history of osteoporosis diagnosed 5 years ago but stopped taking her prescribed bisphosphonate (alendronic acid) 2 years ago due to dyspepsia. Her DEXA scan 5 years ago showed a T-score of -2.8 at the hip. According to NICE NG146 (Osteoporosis) and CG161 (Hip Fracture), what is the most appropriate long-term secondary prevention medication to start post-operatively, assuming no contraindications?