Can a Hangover Start 4 Hours After Drinking? The Truth About Delayed Symptoms
                                
                                
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                                    4 min read                                
                            
                                Hangover symptoms often begin when your blood alcohol concentration (BAC) drops and is at or near zero, not immediately after you stop drinking. This critical piece of science explains why the answer to "Can a hangover start 4 hours after drinking?" is a definitive yes and reveals the mechanisms behind a delayed onset.