| http://www.w3.org/ns/prov#value | - Caffeine causes excess release of stomach acids during ingestion.[citation needed] When in withdrawal the stomach acid levels decrease substantially and can cause some stomach aches in certain people.[citation needed] The aches normally last between 24-48 hours and can be confused with constipation.[citation needed] Analgesics, such as aspirin, can relieve the pain symptoms, as can a small dose of
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