&gt;The new products have led to an alarming public health development in recent years that was unheard of in the many previous decades that people enjoyed caffeine: a rash of thousands of overdoses and reports of addiction and withdrawal.<p>Overdoses being mostly new, I believe, considering how many cups of coffee you&#x27;d have to drink to get a lethal dose. But surely addiction and withdrawal are nothing new. If I let my intake creep up over three cups of coffee per day for over two weeks, I get a severe headache if I go a day without at least one cup. Caffeine withdrawal headaches at least used to be so common that popular headache remedies would include caffeine as well as aspirin and acetaminophen. Is this somehow not common knowledge?