I am torn. My left leg is weaker than my right and always have been. I have been working out faithfully and it remains the same. Although both legs are getting stronger, the left will never catch up to the right. This weakness causes a discernible limp and left legs tires more quickly. Last year my neuro gave me a prescription for Ampyra and it was my choice as to whether I wanted to start or not. He said I would know in a couple of weeks if it helps or not. I never started it. I have read from several patients that they believed that Ampyra caused worsening of their walking so I was too afraid to give it a try. Well, I am still debating. I don't think my walking is any worse than last year. But sometimes I think I should give it a try. I have 2 bottles of Ampyra that I received from the manufacturer last year so I have plenty to give it a trial. But I certainly don't want to worsen things! Advice and comments are welcome!!