Call your doctor at once if you have: For medical advice about side effects, contact your doctor. Effects of carbidopa (more information) Typical adverse effects could be: If you experience any of the following symptoms of an allergic reaction: hives, trouble breathing, swelling of your face, lips, tongue, or throat, seek emergency medical attention. While engaging in routine daytime activities like working, talking, eating, or driving, some people who take carbidopa along with levodopa have dozed off. Consult your doctor if this happens. If you experience any issues with drowsiness or sleepiness during the day, let your doctor know. When carbidopa and levodopa are combined, the following side effects may happen. There may be other side effects; this is not a comprehensive list. Although this side effect is not harmful, it may stain your clothing or bed linens. You may have increased sexual urges, unusual urges to gamble, or other intense urges while taking this medicine. You may notice that your sweat, urine, or saliva appears dark in color, such as red, brown, or black. You can contact the FDA to report side effects at 1-800-FDA-1088. nausea, upset stomach, headaches, vertigo, sleep issues (insomnia), dreaming more than usual, dry mouth, a burning sensation in your tongue, weight changes, or abnormal liver function tests. severe drowsiness, uncontrollable facial movements like chewing, lip-smacking, frowning, tongue movement, blinking, or eye movement, worsening tremors, severe nausea, vomiting, or diarrhea, confusion, hallucinations, unusual changes in mood or behavior, depression or suicidal thoughts, seizures, or severe nervous system reactions like rigid muscles, high fever, sweating, confusion, fast or irregular heartbeats, tremors,
Before taking an opioid, a muscle relaxant, a sleeping aid, or a medication for anxiety or seizures, consult your doctor. Carbidopa drug interactions (more information) Carbidopa may be adversely affected by other medications, including prescription and OTC drugs, vitamins, and herbal remedies. Tell your doctor about all other medicines you use. Using carbidopa with other drugs that make you drowsy can worsen this effect.