What are the three worst bone density drugs?

Could you elaborate on the three worst bone density drugs currently available on the market? I'm particularly interested in understanding why these drugs are considered problematic. Are there any significant side effects associated with their use? Are there any alternative treatments that are more effective and safer for patients? Additionally, are these drugs still widely prescribed, or are doctors and patients becoming more aware of their potential risks? I'd appreciate a detailed response that highlights the key issues surrounding these bone density drugs.