Table 2.
Side effects and adverse reactions associated with carbidopa
| Glossitis | Upper respiratory infection | Phlebitis |
| Leg pain | Agranulocytosis | |
| Ataxia | Bruxism | Hemolytic and nonhemolytic anemia |
| Falling | Hiccups | |
| Gait abnormalities | Common cold | |
| Blepharospasm (which may be taken as an early sign of excess dosage) | Diarrhea | Rash |
| Urinary tract infections | Gastrointestinal bleeding | |
| Trismus | Urinary frequency | Duodenal ulcer |
| Increased tremor | Flatulence | Henoch–Schonlein purpura |
| Numbness | Priapism | |
| Muscle twitching | Pharyngeal pain | Decreased hemoglobin and hematocrit |
| Peripheral neuropathy | Abdominal pain | |
| Myocardial infarction | Bizarre breathing patterns | |
| Flushing | Thrombocytopenia | |
| Oculogyric crises | Burning sensation of tongue | Leukopenia |
| Diplopia | Angioedema | |
| Blurred vision | Back pain | Urticaria |
| Dilated pupils | Shoulder pain | Pruritus |
| Urinary retention | Chest pain (noncardiac) | Alopecia |
| Urinary incontinence | Dark sweat | |
| Dark urine | Muscle cramps | Abnormalities in alkaline |
| Hoarseness | Paresthesia | |
| Malaise | Increased sweating | Phosphatase |
| Hot flashes | Syncope | Abnormalities in |
| Sense of stimulation | Orthostatic hypotension | SGOT (AST) |
| Dyspepsia | SGPT (ALT) | |
| Constipation | Asthenia (weakness) | Abnormal |
| Palpitation | Coombs’ test | |
| Fatigue | Dysphagia | Abnormal uric acid |
| Horner’s syndrome, mydriasis | Hypokalemia | |
| Abnormalities in blood urea nitrogen | ||
| Dry mouth | ||
| Sialorrhea | ||
| Neuroleptic malignant syndrome | Increased creatinine increased serum | |
| LDH | ||
| Glycosuria |