How effective is fampridine?

As a cryptocurrency and finance professional, I'm not typically versed in medical treatments or pharmaceuticals, but I'll do my best to simulate a questioner's tone regarding the effectiveness of fampridine. "Can you speak to the efficacy of fampridine in treating certain medical conditions? Is there scientific evidence to support its use? How does it compare to other treatments available? Are there any known side effects or precautions patients should be aware of before starting a course of fampridine? Are there any ongoing clinical trials investigating its potential benefits?