Our expert says:
Antihistamines aren't exactly "natural" sleeping meds, and can cause dependency and problem just like other such pills. And Syndol contains a major anti-histamine, too, which is very sedative in many people, and I suspect they could for some days have an effect rather like alcohol, in being disinhibiting and making a potential depression more obvious and noticeable.
Congratulations on remaining clean of alcohol for 4 years --- that's a major achievement. Its worth wondering whether your recent sleeping problems could be related to a beginning mood swing from the Bipolar Disorder, and might respond better to an antidepressant or mood stabilizer, either or both of which are much less likely to either worsen depressive tendencies or to encourage one to become dependent on them.
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