1,195 Ritalin & Concerta side effects

Between 2004 and 2006 the FDA MedWatch program received 2,176 Individual Safety Reports naming methylphenidate (bestsellers Ritalin, Concerta, Daytrana) the Primary Suspect Drug for 1,195 distinct adverse reactions including akathisia, bruxism, chorea, dyskinesia, dysphagia, dyspraxia, dysstasia and dystonia.

All 1,195 methylphenidate side effects are listed below in alphabetical order.

Abasia, Abdominal Discomfort, Abdominal Pain, Abdominal Pain Upper, Abnormal Behaviour, Abnormal Dreams, Abortion Induced, Abortion Spontaneous, Abscess Drainage, Abscess Limb, Acanthosis Nigricans, Acarodermatitis, Accident, Accidental Death, Accidental Drug Intake By Child, Accidental Exposure, Accidental Overdose, Accommodation Disorder, Activities of Daily Living Impaired, Acute Lymphocytic Leukaemia, Acute Myocardial Infarction, Acute Pulmonary Oedema, Adverse Drug Reaction, Adverse Event, Affect Lability, Affective Disorder, Aggression, Agitation, Akathisia, Alanine Aminotransferase Increased, Alcohol Interaction, Alcohol Poisoning, Alcohol Use, Alcohol Withdrawal Syndrome, Alcoholic, Alcoholism, Alopecia, Amenorrhoea, Amnesia, Amnestic Disorder, Amputation, Anaemia, Anaesthetic Complication Cardiac, Anaesthetic Complication Pulmonary, Anaphylactic Reaction, Anger, Angina Pectoris, Angiogram Cerebral Abnormal, Angioneurotic Oedema, Angiopathy, Angioplasty, Angle Closure Glaucoma, Anorexia, Anterograde Amnesia, Anticipatory Anxiety, Anticonvulsant Drug Level Below Therapeutic, Antinuclear Antibody Positive, Antipsychotic Drug Level Above Therapeutic, Anuria, Anxiety, Anxiety Disorder, Aortic Aneurysm, Apathy, Apgar Score Low, Aphagia, Aphasia, Aplastic Anaemia, Apnoea, Appendicectomy, Application Site Dermatitis, Application Site Erythema, Application Site Hypersensitivity, Application Site Inflammation, Application Site Oedema, Application Site Pain, Application Site Pruritus, Application Site Rash, Application Site Reaction, Application Site Swelling, Application Site Vesicles, Apraxia, Areflexia, Arrhythmia, Arrhythmia Supraventricular, Arterial Occlusive Disease, Arthralgia, Arthritis, Asocial Behaviour, Aspartate Aminotransferase Increased, Asthenia, Asthenopia, Asthma, Astrocytoma, Atrial Fibrillation, Atrial Flutter, Atrial Hypertrophy, Atrial Tachycardia, Atrial Thrombosis, Atrioventricular Block Complete, Atrioventricular Block First Degree, Atrioventricular Block Second Degree, Atrioventricular Block Third Degree, Attention Deficit Hyperactivity Disorder, Autism, Autism Spectrum Disorder, Autoimmune Hepatitis, Autoimmune Thyroiditis, Back Disorder, Back Pain, Bacterial Infection, Balance Disorder, Bedridden, Benign Intracranial Hypertension, Biopsy Bone Marrow Abnormal, Biopsy Liver Normal, Bipolar Disorder, Bite, Blindness, Blindness Transient, Blindness Unilateral, Blister, Blood Alkaline Phosphatase Increased, Blood Amylase Increased, Blood Bicarbonate Decreased, Blood Bilirubin Increased, Blood Calcium Increased, Blood Cholesterol Increased, Blood Creatine Phosphokinase Abnormal, Blood Creatine Phosphokinase Increased, Blood Creatine Phosphokinase Mb, Blood Creatinine Increased, Blood Ethanol Increased, Blood Glucose Decreased, Blood Glucose Increased, Blood Insulin Decreased, Blood Lactate Dehydrogenase Increased, Blood Magnesium Decreased, Blood Phosphorus Increased, Blood Potassium Decreased, Blood Potassium Increased, Blood Pressure, Blood Pressure Abnormal, Blood Pressure Decreased, Blood Pressure Diastolic Decreased, Blood Pressure Fluctuation, Blood Pressure Inadequately Controlled, Blood Pressure Increased, Blood Thyroid Stimulating Hormone Increased, Blood Uric Acid Increased, Blood Urine, Blood Urine Present, Body Height Below Normal, Body Height Increased, Body Temperature Decreased, Body Temperature Increased, Bone Development Abnormal, Bone Disorder, Bone Pain, Bradycardia, Brain Damage, Brain Natriuretic Peptide Increased, Brain Neoplasm, Brain Neoplasm Benign, Brain Oedema, Brain Stem Infarction, Breast Neoplasm, Breath Odour, Bronchitis, Bronchopneumonia, Bronchospasm, Bruxism, Bulbar Palsy, Bulimia Nervosa, Bundle Branch Block Left, Burn Infection, Burns Second Degree, Caesarean Section, Calculus Ureteric, Capillary Disorder, Cardiac Arrest, Cardiac Disorder, Cardiac Enzymes Increased, Cardiac Failure, Cardiac Failure Congestive, Cardiac Fibrillation, Cardiac Flutter, Cardiac Hypertrophy, Cardiac Murmur, Cardiomegaly, Cardiomyopathy, Cardio-Respiratory Arrest, Cardiovascular Disorder, Carotid Artery Occlusion, Carotid Artery Thrombosis, Cartilage Injury, Cataplexy, Cataract, Catatonia, Catheter Placement, Catheterisation Cardiac, Cellulitis, Central Nervous System Lesion, Cerebellar Infarction, Cerebellar Syndrome, Cerebral Arteritis, Cerebral Artery Occlusion, Cerebral Artery Stenosis, Cerebral Artery Thrombosis, Cerebral Atrophy, Cerebral Cyst, Cerebral Disorder, Cerebral Haematoma, Cerebral Haemorrhage, Cerebral Infarction, Cerebral Ischaemia, Cerebral Palsy, Cerebrovascular Accident, Cerebrovascular Arteriovenous Malformation, Cerebrovascular Disorder, Cerebrovascular Spasm, Ceruloplasmin Decreased, Cheilitis, Chest Discomfort, Chest Pain, Childhood Psychosis, Chills, Choking, Cholecystitis Acute, Cholelithiasis, Cholestasis, Chorea, Choreoathetosis, Chromaturia, Chromosomal Deletion, Chromosome Abnormality, Circulatory Collapse, Circumstance Or Information Capable of Leading To Medication Error, Claustrophobia, Clostridial Infection, Clumsiness, Coagulopathy, Cognitive Disorder, Cold Sweat, Coloboma, Colour Blindness, Colour Blindness Acquired, Coma, Completed Suicide, Complex Regional Pain Syndrome, Complications of Maternal Exposure To Therapeutic Drugs, Compulsions, Concussion, Condition Aggravated, Conduction Disorder, Confusional State, Congenital Genital Malformation, Congenital Ventricular Septal Defect, Congestive Cardiomyopathy, Conjunctival Haemorrhage, Conjunctivitis, Constipation, Contusion, Conversion Disorder, C-Reactive Protein Increased, Convulsion, Coordination Abnormal, Copper Metabolism Disorder, Coronary Artery Occlusion, Coronary Artery Thrombosis, Costochondritis, Cough, Coxsackie Pericarditis, Creatinine Renal Clearance Decreased, Crohn's Disease, Crying, Cryptorchism, Csf Cell Count Increased, Cutaneous Lupus Erythematosus, Cyanosis, Cyanosis Central, Cyanosis Neonatal, Deafness, Deafness Bilateral, Deafness Neurosensory, Death, Decreased Appetite, Defaecation Urgency, Dehydration, Deja Vu, Delayed Puberty, Delirium, Delusion, Delusion of Grandeur, Delusional Disorder (Persecutory Type), Dementia, Dementia Alzheimer's Type, Dental Caries, Dependence, Depressed Level of Consciousness, Depressed Mood, Depression, Depression Suicidal, Depressive Symptom, Derealisation, Dermatitis Allergic, Dermatitis Bullous, Dermatitis Contact, Detoxification, Developmental Delay, Diabetes Mellitus, Diabetes Mellitus Insulin-Dependent, Diabetes Mellitus Non-Insulin-Dependent, Dialysis, Diarrhoea, Diarrhoea Haemorrhagic, Diastolic Dysfunction, Difficulty In Walking, Dilatation Atrial, Diplopia, Discomfort, Disease Recurrence, Disinhibition, Disorientation, Dissociative Identity Disorder, Distractibility, Disturbance In Attention, Disturbance In Social Behaviour, Divorced, Dizziness, Dizziness Postural, Drowning, Drug Abuser, Drug Administration Error, Drug Dependence, Drug Dispensing Error, Drug Dose Omission, Drug Effect Decreased, Drug Exposure During Pregnancy, Drug Exposure Via Breast Milk, Drug Hypersensitivity, Drug Ineffective, Drug Interaction, Drug Intolerance, Drug Level Above Therapeutic, Drug Level Below Therapeutic, Drug Level Decreased, Drug Level Increased, Drug Prescribing Error, Drug Resistance, Drug Screen Positive, Drug Tolerance Decreased, Drug Tolerance Increased, Drug Toxicity, Drug Withdrawal Convulsions, Drug Withdrawal Headache, Drug Withdrawal Syndrome, Drug Withdrawal Syndrome Neonatal, Dry Mouth, Dry Skin, Duodenal Ulcer, Dysarthria, Dysgraphia, Dyskinesia, Dyslexia, Dyspepsia, Dysphagia, Dysphemia, Dysphonia, Dyspnoea, Dyspnoea Exertional, Dyspraxia, Dysstasia, Dystonia, Dysuria, Ear Operation, Eating Disorder, Ecg Signs of Ventricular Hypertrophy, Echocardiogram Abnormal, Eczema, Educational Problem, Ejection Fraction Decreased, Electrocardiogram Abnormal, Electrocardiogram Qrs Complex Abnormal, Electrocardiogram Qrs Complex Prolonged, Electrocardiogram Qrs Complex Shortened, Electrocardiogram QT Corrected Interval Prolonged, Electrocardiogram QT Prolonged, Electrocardiogram St Segment Depression, Electrocardiogram St Segment Elevation, Electrocardiogram T Wave Abnormal, Electroencephalogram Abnormal, Electrooculogram Abnormal, Elevated Mood, Emotional Disorder, Emotional Distress, Encephalitis, Endocrine Ophthalmopathy, Enterococcal Infection, Enuresis, Eosinophil Count Increased, Eosinophilia, Epilepsy, Epistaxis, Erectile Dysfunction, Erection Increased, Erosive Oesophagitis, Erythema, Erythema Infectiosum, Euphoric Mood, Excessive Exercise, Excitability, Excoriation, Exercise Tolerance Decreased, Extrapyramidal Disorder, Extrasystoles, Extremity Necrosis, Eye Disorder, Eye Haemorrhage, Eye Infection, Eye Irritation, Eye Movement Disorder, Eye Pain, Eye Pruritus, Eye Rolling, Eye Swelling, Eyelid Function Disorder, Face Oedema, Facial Palsy, Facial Paresis, Failure To Thrive, Fall, Fatigue, Fear, Febrile Convulsion, Febrile Neutropenia, Feeling Abnormal, Feeling Cold, Feeling Drunk, Feeling Hot, Feeling Jittery, Feeling of Despair, Fibrin D Dimer Increased, Fight In School, Finger Amputation, Flat Affect, Flatulence, Flight of Ideas, Flushing, Foetal Growth Retardation, Food Craving, Foot Fracture, Formication, Fracture, Frustration, Fungal Infection, Gait Disturbance, Galactorrhoea, Gamma-Glutamyltransferase Increased, Ganglioneuroma, Gastric Bypass, Gastric Disorder, Gastric Lavage, Gastric Ulcer, Gastritis, Gastritis Atrophic, Gastroenteritis, Gastroenteritis Rotavirus, Gastroenteritis Viral, Gastrointestinal Disorder, Gastrointestinal Haemorrhage, Gastrointestinal Obstruction, Gastrointestinal Pain, Gastrointestinal Perforation, Gastrointestinal Ulcer, Gastrooesophageal Reflux Disease, Gaze Palsy, Gene Mutation, General Physical Condition Abnormal, General Physical Health Deterioration, Generalised Anxiety Disorder, Generalised Erythema, Genital Disorder Male, Gingival Disorder, Gingival Pain, Gingivitis, Glaucoma, Glomerulonephritis, Glossodynia, Glucose Urine Present, Grand Mal Convulsion, Grandiosity, Granulocytopenia, Granulomatous Liver Disease, Growth Retardation, Gynaecomastia, Haemangioblastoma, Haemangioma, Haematemesis, Haematochezia, Haematocrit Decreased, Haematoma, Haematuria, Haemodialysis, Haemoglobin Decreased, Haemolysis, Haemoptysis, Haemorrhage, Haemorrhage Urinary Tract, Haemorrhagic Diathesis, Hair Disorder, Hair Plucking, Hallucination, Hallucination (Auditory), Hallucination (Tactile), Hallucination (Visual), Hallucinations (Mixed), Hangover, Head Discomfort, Head Injury, Headache, Hearing Impaired, Heart Rate Abnormal, Heart Rate Decreased, Heart Rate Increased, Heart Rate Irregular, Heat Exhaustion, Helicobacter Infection, Hemianopia, Hemiparesis, Hemiplegia, Henoch-Schonlein Purpura, Hepatic Congestion, Hepatic Enzyme Increased, Hepatic Failure, Hepatic Function Abnormal, Hepatic Lesion, Hepatic Necrosis, Hepatitis, Hepatitis A, Hepatitis B, Hepatitis C Positive, Hepato-Lenticular Degeneration, Hepatomegaly, Herpes Ophthalmic, Herpes Virus Infection, High Risk Sexual Behaviour, Homicidal Ideation, Homicide, Hospitalisation, Hostility, Hot Flush, Hyperaemia, Hyperbilirubinaemia, Hyperglycaemia, Hyperhidrosis, Hyperkalaemia, Hyperkeratosis Follicularis Et Parafollicularis, Hyperlactacidaemia, Hyperplasia, Hyperprolactinaemia, Hypersensitivity, Hypersomnia, Hypertension, Hypertensive Crisis, Hyperthermia, Hyperthyroidism, Hypertonia, Hypertriglyceridaemia, Hyperventilation, Hypoacusis, Hypoaesthesia, Hypoaesthesia Oral, Hypoglycaemia, Hypogonadism, Hypokinesia, Hypomagnesaemia, Hypomania, Hyponatraemia, Hyporeflexia, Hypotension, Hypothermia, Hypothyroidism, Hypotonia, Hypotonia Neonatal, Hypotrichosis, Hypoxia, Iatrogenic Injury, Idiopathic Thrombocytopenic Purpura, Iiird Nerve Paresis, Ill-Defined Disorder, Illusion, Immobile, Immune System Disorder, Immunodeficiency, Impaired Driving Ability, Impaired Gastric Emptying, Impulse-Control Disorder, Impulsive Behaviour, Inappropriate Affect, Inappropriate Schedule of Drug Administration, Incoherent, Incontinence, Incorrect Dose Administered, Incorrect Route of Drug Administration, Increased Appetite, Increased Tendency To Bruise, Increased Upper Airway Secretion, Infection, Infection In an Immunocompromised Host, Infectious Mononucleosis, Infertility, Infertility Male, Inflammation, Influenza, Influenza Like Illness, Initial Insomnia, Injection Site Reaction, Injury, Injury Asphyxiation, Inner Ear Disorder, Insomnia, Intentional Drug Misuse, Intentional Misuse, Intentional Overdose, Intentional Self-Injury, International Normalised Ratio Increased, Intestinal Obstruction, Intestinal Resection, Intestinal Stenosis, Intracranial Aneurysm, Intraocular Pressure Increased, Intra-Uterine Death, Intussusception, Iris Hypopigmentation, Iron Deficiency, Iron Deficiency Anaemia, Irritability, Ischaemic Cerebral Infarction, Ischaemic Stroke, Jaundice, Jaw Disorder, Joint Dislocation, Joint Injury, Joint Stiffness, Knee Operation, Laboratory Test Abnormal, Laboratory Test Interference, Laceration, Lacunar Infarction, Laparoscopic Surgery, Laparoscopy, Learning Disability, Learning Disorder, Leg Amputation, Legal Problem, Lens Disorder, Lethargy, Leukaemia, Leukocytosis, Leukopenia, Libido Decreased, Libido Increased, Lichen Planus, Lip Exfoliation, Lip Swelling, Lipase Increased, Listless, Livedo Reticularis, Liver Disorder, Liver Function Test Abnormal, Lividity, Local Swelling, Localised Infection, Logorrhoea, Loss of Consciousness, Loss of Employment, Low Density Lipoprotein Increased, Lower Limb Fracture, Lower Respiratory Tract Infection, Lung Disorder, Lung Infection, Lung Infiltration, Lung Injury, Lyme Disease, Lymphadenopathy, Lymphocyte Percentage Decreased, Lymphopenia, Macular Hole, Maculopathy, Madarosis, Major Depression, Malabsorption, Malaise, Male, Malignant Hypertension, Mania, Marital Problem, Markedly Reduced Dietary Intake, Maternal Drugs Affecting Foetus, Mean Cell Haemoglobin, Mean Cell Haemoglobin Concentration Decreased, Mean Cell Volume Abnormal, Meconium Stain, Medication Error, Megakaryocytes Decreased, Memory Impairment, Meningitis, Meningococcal Sepsis, Menstruation Irregular, Mental Disorder, Mental Impairment, Mental Status Changes, Merycism, Metabolic Acidosis, Metabolic Disorder, Metanephrine Urine Increased, Microalbuminuria, Micturition Urgency, Middle Insomnia, Migraine, Miosis, Mitral Valve Incompetence, Mitral Valve Prolapse, Mobility Decreased, Monocyte Percentage Decreased, Monocytosis, Mononucleosis Heterophile Test Positive, Monoparesis, Mood Altered, Mood Swings, Morbid Thoughts, Motion Sickness, Motor Dysfunction, Mouth Haemorrhage, Movement Disorder, Multiple Drug Overdose, Multiple Drug Overdose Intentional, Muscle Contractions Involuntary, Muscle Contracture, Muscle Cramp, Muscle Enzyme Increased, Muscle Fatigue, Muscle Necrosis, Muscle Rigidity, Muscle Spasms, Muscle Spasticity, Muscle Tightness, Muscle Twitching, Muscular Weakness, Musculoskeletal Discomfort, Musculoskeletal Stiffness, Myalgia, Mycoplasma Infection, Mydriasis, Myocardial Fibrosis, Myocardial Infarction, Myocarditis, Myoglobin Blood Increased, Myopathy, Myopericarditis, Myositis, Narcolepsy, Nasal Congestion, Nasopharyngitis, Nausea, Near Drowning, Neck Pain, Necrosis, Negative Thoughts, Negativism, Neonatal Apnoeic Attack, Neonatal Disorder, Neonatal Respiratory Distress Syndrome, Neoplasm Malignant, Nephrolithiasis, Nerve Injury, Nerve Root Compression, Nervous System Disorder, Nervousness, Neuroleptic Malignant Syndrome, Neurological Symptom, Neutropenia, Neutrophil Count Decreased, Neutrophil Count Increased, Neutrophil Percentage Decreased, Night Sweats, Nightmare, No Adverse Drug Effect, No Adverse Effect, Non-Cardiac Chest Pain, Nonspecific Reaction, Normal Newborn, Nuclear Magnetic Resonance Imaging Abnormal, Nuclear Magnetic Resonance Imaging Brain Abnormal, Nystagmus, Obsessive-Compulsive Disorder, Ocular Icterus, Oculogyration, Oedema, Oedema Mouth, Oedema Mucosal, Oedema Peripheral, Oesophageal Disorder, Oesophageal Pain, Oesophageal Spasm, Oesophagitis, Off Label Use, Oliguria, Opisthotonus, Oppositional Defiant Disorder, Optic Atrophy, Optic Disc Haemorrhage, Optic Discs Blurred, Optic Ischaemic Neuropathy, Optic Nerve Cupping, Optic Nerve Disorder, Optic Nerve Injury, Optic Neuritis, Oral Intake Reduced, Oral Pain, Oral Pruritus, Oral Soft Tissue Disorder, Oropharyngeal Swelling, Orthopnoea, Orthostatic Hypotension, Osteoarthritis, Osteochondrosis, Osteomyelitis, Osteonecrosis, Osteopenia, Otitis Media, Ovarian Failure, Overdose, Overweight, Oxygen Saturation Decreased, Pain, Pain In Extremity, Pallor, Palpitations, Pancreatic Cyst, Pancreatitis, Pancreatitis Acute, Pancytopenia, Panic Attack, Panic Disorder, Panic Reaction, Papilloedema, Paradoxical Drug Reaction, Paraesthesia, Paraesthesia Oral, Paralysis, Paranoia, Paraplegia, Paresis, Parkinsonism, Parkinson's Disease, Parosmia, Partial Seizures, Pelvic Deformity, Penile Pain, Penile Size Reduced, Penis Disorder, Performance Fear, Performance Status Decreased, Pericardial Rub, Pericarditis, Periodontitis, Periorbital Haematoma, Peripheral Coldness, Peripheral Ischaemia, Peritoneal Neoplasm, Peroneal Nerve Palsy, Persecutory Delusion, Personality Change, Personality Disorder, Petechiae, Petit Mal Epilepsy, Pharmaceutical Product Complaint, Pharyngeal Erythema, Pharyngitis, Pharyngolaryngeal Pain, Phobia, Photophobia, Photosensitivity Reaction, Physical Assault, Physiotherapy, Pica, Platelet Count Decreased, Platelet Count Increased, Pleural Effusion, Pleurisy, Pleuritic Pain, Pneumonia, Pneumonia Aspiration, Pneumonitis, Poikilocytosis, Poisoning, Poisoning Deliberate, Pollakiuria, Polydipsia, Polysubstance Abuse, Polyuria, Poor Peripheral Circulation, Post Procedural Complication, Postictal State, Postpartum Depression, Post-Traumatic Stress Disorder, Posture Abnormal, Posturing, Pregnancy, Premature Baby, Premature Labour, Prescribed Overdose, Pressure of Speech, Priapism, Procedural Complication, Prostatitis, Prostration, Protein Urine Present, Proteinuria, Prothrombin Time Prolonged, Pruritus, Pruritus Generalised, Psychiatric Symptom, Psychomotor Hyperactivity, Psychomotor Retardation, Psychopathic Personality, Psychotic Disorder, Pulmonary Congestion, Pulmonary Embolism, Pulmonary Infarction, Pulmonary Oedema, Pulmonary Valve Incompetence, Pulse Absent, Pulse Pressure Decreased, Pupils Unequal, Purpura, Purulence, Pyrexia, Rash, Rash Erythematous, Rash Generalised, Rash Papular, Rash Pruritic, Rash Scaly, Rash Vesicular, Raynaud's Phenomenon, Reading Disorder, Rebound Effect, Rectal Cancer, Rectal Discharge, Rectal Haemorrhage, Red Blood Cell Abnormality, Red Blood Cell Count Decreased, Red Blood Cell Sedimentation Rate Increased, Refusal of Treatment By Patient, Rehabilitation Therapy, Renal Disorder, Renal Failure, Renal Failure Acute, Renal Pain, Reproductive Tract Hypoplasia, Respiratory Acidosis, Respiratory Arrest, Respiratory Depression, Respiratory Disorder, Respiratory Failure, Respiratory Rate Increased, Restlessness, Resuscitation, Retching, Reticulocyte Count Decreased, Reticulocyte Percentage Decreased, Retinal Detachment, Retinal Disorder, Retinal Pigmentation, Retinitis Pigmentosa, Retinopathy, Reversible Ischaemic Neurological Deficit, Rhabdomyolysis, Rheumatoid Nodule, Rhinitis Allergic, Rhinorrhoea, Road Traffic Accident, Salivary Hypersecretion, Sarcoidosis, Scar, Scarlet Fever, Schamberg's Disease, Schizoaffective Disorder, Schizophrenia, Scoliosis, Scratch, Screaming, Secretion Discharge, Sedation, Self Esteem Inflated, Self Injurious Behaviour, Self Mutilation, Self-Injurious Ideation, Self-Medication, Semen Abnormal, Sensation of Foreign Body, Sensory Disturbance, Sensory Loss, Sepsis, Serotonin Syndrome, Sexual Activity Increased, Shock, Simple Partial Seizures, Sinoatrial Block, Sinus Arrhythmia, Sinus Bradycardia, Sinus Tachycardia, Sinusitis, Skin Bleeding, Skin Discolouration, Skin Disorder, Skin Inflammation, Skin Injury, Skin Irritation, Skin Laceration, Skin Lesion, Skin Odour Abnormal, Skin Ulcer, Skin Warm, Skull Fracture, Sleep Apnoea Syndrome, Sleep Disorder, Sleep Talking, Sleep Terror, Social Avoidant Behaviour, Somnolence, Sopor, Speech Disorder, Speech Rehabilitation, Spermatogenesis Abnormal, Spider Naevus, Spleen Disorder, Splenic Infection, Splenic Vein Thrombosis, Splenomegaly, Staphylococcal Infection, Staring, Status Epilepticus, Stent Placement, Stevens-Johnson Syndrome, Stomach Discomfort, Stomatitis, Strabismus, Stress, Stress Symptoms, Subarachnoid Haemorrhage, Subclavian Vein Thrombosis, Sudden Cardiac Death, Sudden Death, Sudden Onset of Sleep, Suicidal Ideation, Suicide Attempt, Supraventricular Extrasystoles, Supraventricular Tachycardia, Surgery, Suspiciousness, Sweat Gland Disorder, Swelling Face, Swollen Tongue, Sympathomimetic Effect, Syncope, Syncope Vasovagal, Systemic Lupus Erythematosus, Tachycardia, Tardive Dyskinesia, Tearfulness, Tendon Injury, Tension, Testicular Retraction, Theft, Therapeutic Agent Toxicity, Therapeutic Product Ineffective, Therapeutic Response Decreased, Therapeutic Response Delayed, Therapeutic Response Unexpected, Therapeutic Response Unexpected With Drug Substitution, Therapy Cessation, Therapy Non-Responder, Thermal Burn, Thinking Abnormal, Thirst, Throat Irritation, Thrombocytopenia, Thrombocytopenic Purpura, Thrombophlebitis Superficial, Thrombosis, Thyroid Gland Cancer, Thyroidectomy, Thyroxine Decreased, Tic, Tinnitus, Tongue Atrophy, Tongue Biting, Tongue Disorder, Tonic Convulsion, Tonsillar Disorder, Tonsillar Hypertrophy, Tooth Discolouration, Tooth Disorder, Tooth Extraction, Tooth Infection, Tooth Loss, Torsade De Pointes, Torticollis, Tourette's Disorder, Toxic Epidermal Necrolysis, Trance, Transaminases Increased, Transient Ischaemic Attack, Transient Psychosis, Transplant Rejection, Traumatic Haematoma, Treatment Noncompliance, Tremor, Tremor Neonatal, Trichotillomania, Tricuspid Valve Incompetence, Tri-Iodothyronine Increased, Trismus, Troponin I Increased, Troponin Increased, Troponin T Increased, Tubulointerstitial Nephritis, Tympanic Membrane Perforation, Ulcer, Ulcer Haemorrhage, Ultrasound Doppler Abnormal, Ultrasound Liver Abnormal, Underdose, Underweight, Unevaluable Event, Unexpected Therapeutic Drug Effect, Unintended Pregnancy, Upper Respiratory Tract Infection, Urinary Incontinence, Urinary Retention, Urinary Tract Infection, Urinary Tract Infection Enterococcal, Urine Output Increased, Urticaria, Urticaria Generalised, Urticaria Localised, Vaginal Haemorrhage, Varicose Vein, Vascular Injury, Vascular Occlusion, Vasculitic Rash, Vasculitis, Vasculitis Cerebral, Vasculitis Necrotising, Vasoconstriction, Vasospasm, Vein Disorder, Ventricular Arrhythmia, Ventricular Dysfunction, Ventricular Extrasystoles, Ventricular Fibrillation, Ventricular Hypertrophy, Ventricular Hypokinesia, Ventricular Septal Defect Acquired, Ventricular Tachycardia, Verbigeration, Vertigo, Viral Infection, Viral Myositis, Vision Blurred, Visual Acuity Reduced, Visual Disturbance, Visual Field Defect, Vitamin B12 Deficiency, Vitamin C Increased, Vith Nerve Paralysis, Vocal Cord Disorder, Vomiting, Weight Below Normal, Weight Decreased, Weight Gain Poor, Weight Increased, Wheezing, White Blood Cell Count Decreased, White Blood Cell Count Increased, White Blood Cell Disorder, Wolff-Parkinson-White Syndrome, Wound Secretion, Wrong Drug Administered, Wrong Technique In Drug Usage Process, Xanthochromia, Xanthoma.

Top 20 methylphenidate side effects reported to FDA MedWatch between 2004 and 2006:

Aggression - 95 cases Suicidal Ideation - 78 cases Abnormal Behaviour - 76 cases Headache - 76 cases Depression - 70 cases Hallucination - 69 cases Chest Pain - 68 cases Convulsion - 63 cases Insomnia - 61 cases Decreased Weight - 60 cases Anxiety - 55 cases Increased Heart Rate - 55 cases Vomiting - 54 cases Psychotic Disorder - 53 cases Agitation - 51 cases Anorexia - 51 cases Nausea - 51 cases Suicide Attempt - 44 cases Hypertension - 42 cases Tremor - 40 cases

      Thanks to Lamplighter Software for making the FDA MedWatch data available to the public.