For a long-standing cough with thick, green mucus, an expectorant like guaifenesin can help thin the secretions, making them easier to cough up. Staying well-hydrated by drinking plenty of water is also highly effective. Because your symptoms have been going on for a while, it is best to consult a doctor for a proper evaluation. They can determine if your symptoms are due to a bacterial infection that may require prescription antibiotics, or if another treatment is more appropriate. Please avoid taking antibiotics without a doctor's guidance, and seek professional care to ensure you get the right treatment.
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I have a long-standing cough and cold with thick, green mucus that is difficult to cough up. What medication should I take to treat this?