Can Concerta cause Mood Swings? Mood Swings is a known side effect of Concerta. Complete analysis from patient reviews and trusted online health resources, including. Find patient medical information for Concerta oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings. Could Concerta cause Mood swings? We studied 8,783 Concerta users who have side effects from FDA and social media. Among them, 125 have mood swings. See what we found Concerta Side Effects and Warnings. Updated August 4. Overdose Side Effects. Methylphenidate drugs have been. and keep a more stable mood when taking Flavay. Learn about the potential side effects of Concerta (methylphenidate). Includes common and rare side effects information for consumers and healthcare professionals. Find a comprehensive guide to possible side effects when taking Concerta (Methylphenidate Extended-Release Tablets) for Professionals, Patients, and Caregivers. Consumer ratings reports for CONCERTA. Includes 734 patient rankings on scale of 1-5, comments, side effects, dosage, sex, age, time taken. Page 1 of 13 My younger brother has ADHD-inattentive type, for which he takes Concerta. He has been suffering from mood symptoms for quite some time. He claims that he feels blah.