Abstinent may continue (caffeine use).Logical formLearned from1 sentences. Caffeine may cause symptoms.Logical formLearned from1 sentences. Problems can be with (caffeine use).Logical formLearned from1 sentences. A caffeine may produce addiction from report.Logical formLearned from1 sentences. Side effects can be from caffeine.Logical formLearned from1 sentences. A government-agency may regulate caffeine.Logical formLearned from1 sentences. A person may stop caffeine.Logical formLearned from1 sentences. Caffeine may create a physiological dependence.Logical formLearned from1 sentences. Caffeine may exhibit features of a (psychoactive substance) of dependence.Logical formLearned from1 sentences. A study may describe (caffeine dependence syndrome).Logical formLearned from1 sentences. Cravings can be for caffeine.Logical formLearned from1 sentences. A female may eschew caffeine.Logical formLearned from1 sentences. Caffeine may contribute to an effect.Logical formLearned from1 sentences. Blends can be lower in caffeine.Logical formLearned from1 sentences. Caffeine can be nontoxic.Logical formLearned from1 sentences.