I am Dr. Arun and will be helping you today.
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I agree, that Maxalt is not likely to be responsible for it. You may get following investigations done to confirm the cause;
1) Serum electrolytes; sodium, potassium, chloride, bicarbonates.
2) Serum magnesium
3) Serum calcium
4) Electrophysiological studies which entails nerve conduction velocity study and electromyography.
Meanwhile you need to take plenty of fluids, Pedialyte, Gatorade, fresh fruit juices, soups, vegetable broths and coconut water.
I would be happy to assist you further, if you need any more information.
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