Boswellia Side Effects, Interactions and Warnings Boswellia Side Effects, Interactions and Warnings May cause heartburn, skin rash, diarrhea or nausea. Do not exceed recommended dosage. Possibility that boswellia may increase or decrease the effects of medications. Do not give to children and use caution if you are pregnant or nursing. Herbal Side Effects, Interactions and Warnings Supplement Side Effects, Interactions and Warnings Prescription Drug Interactions and Warnings Prescription Information Resources Disease Information last update: March 2014