He struggled to feed and lost weight, but it took four days until his cleft palate was identified.

BBC: Surgeons warn many cleft palate cases missed at birth

One of the ingredients in Qsymia is topiramate, an anti-convulsant that has been linked to birth defects such as cleft lip and cleft palate in babies born to women who have taken it for migraines or seizures.

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It appears that a particular group of mothers may be susceptible to having a child with a cleft.

BBC: Folic acid 'cuts cleft palate risk'