Hi,
Thank you for asking your question on Just Answer. Swanson's Joint Care with the ingredients you mentioned above should have no side effects at all. It should not interfere with Synthyroid or Apple Cider Vinegar tablets either. There is a bit of controversy about the effectiveness of Glucosamine, chondroitin and MSM because once the compounds have gone through the digestive system, there is virtually no appreciable amount left to get "to the joints". But, there is much anecdotal evidence to support it's use. Many people find it helpful. It is a "do no harm" kind of product and it should not cause you any difficulty to try it and see if it helps you. It may take about 3-4 weeks before you notice a difference.
Good luck! Please let me know if you need more information.
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