If you are already taking levodopa (Larodopa, Dopar), you must stop taking it at least 12 hours before you start taking carbidopa and levodopa.
It may take up to several weeks of using carbidopa and levodopa before your symptoms improve. For best results, keep using the medication as directed. Talk with your doctor if your symptoms do not improve after a few weeks of treatment. Also tell your doctor if the effects of this medication seem to wear off quickly in between doses.
Do not crush, chew, or break an extended-release tablet (Sinemet CR). Swallow the pill whole. Breaking or opening the pill may cause too much of the drug to be released at one time.
Carbidopa and levodopa can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert.
This medication may cause you to fall asleep during normal daytime activities such as working, talking, eating, or driving. You may fall asleep suddenly, even after feeling alert. Tell your doctor if you have any problems with daytime sleepiness or drowsiness. If you are unsure of how this medicine will affect you, be careful if you drive or do anything that requires you to be awake and alert.
You may have increased sexual urges, unusual urges to gamble, or other intense urges while taking this medication. Talk with your doctor if you believe you have any intense or unusual urges while taking carbidopa and levodopa.