how long is caffeine in your system when nursing
In most cases, caffeine has a half-life of about 5 hours (meaning 5 hours is needed to eliminate half the coffee amount). However, it might take longer â for instance, a pregnant woman might have caffeine in her system up to 20 hours after she ingests it. Some diseases and medications can make it last longer, as can smoking. The problem becomes when you drink too many beverages containing caffeine.