It starts working right away. You won't notice much because even if the bacteria are gone, you will still have some irritation and mucous in your lungs. This doesn't mean it hasn't worked, just that you have to get all that stuff calmed down.
- Clarithromycin Information for Consumers
- Clarithromycin Information for Healthcare Professionals (includes dosage details)
- Side Effects of Clarithromycin (detailed)
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