What is the toxicity of fampridine?

Can you tell me more about the potential toxicity of fampridine? I'm curious about its side effects and what precautions should be taken when administering this medication. Is it known to cause any serious adverse reactions in patients? How does it compare to other similar drugs in terms of safety? Additionally, are there any specific populations, such as children or pregnant women, who should avoid taking fampridine due to increased risk of toxicity?