Singulair and care physician

My 8 yearold daughter after about 2 months of being on singulair started having muscle spasms on her right side of neck and face. Later the spasms started getting worse. She said like she felt someone was jerking her head. She also started having uncontrollable kicking spasms. We had an MRI of her brain and spine done. Nothing, she was fine. We had a biospy of a small lesion from a prior cut; nothing again. Finally, we took her off the singulair, the only drug she was taking. She is now fine. Her primary care physician, said mmmmm, possibility. It just seems too coincidental that the spasms started after she began taking singulair then stopped after we took her off. Anyone else, have similar experience??