Concentra generic name methylphenidate hydrochloride controlled release tablets, may induce or aggravate tic disorders, the use of the drug before the need for relevant clinical evaluation, this product is used for the treatment of attention deficit hyperactivity disorder. Methylphenidate Hydrochloride Controlled Release Tablets is the main ingredient is methylphenidate hydrochloride, belongs to is a central nervous system stimulant, used for the treatment of attention deficit hyperactivity disorder. This product may induce or exacerbate tics, including motor tics and obscene tics, and the patient’s family history should be taken into account for relevant clinical evaluation prior to administration. Adverse effects of this product are commonly associated with anxiety, headache, nausea, diarrhea, loss of appetite, constipation, and is contraindicated in patients with glaucoma, in those who are allergic to its ingredients; and in patients with significant nervousness and anxiety. Precautions are used with caution in people with structural cardiac dysfunction. If you need to use this product, you need to apply under the guidance of a physician, do not self-medication, to avoid causing adverse consequences.