Does Tofen Make You Sleepy? Understanding the Side Effects
                                
                                
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                                    3 min read                                
                            
                                According to the Mayo Clinic, drowsiness is a documented side effect of ketotifen, the active ingredient in Tofen. This sedative effect can be more pronounced when starting treatment or with higher amounts of the medication. Understanding why and how to manage this can help patients adapt to their medication regimen.