1. When it's a proper noun:
* If "Reflux" refers to a specific product, brand, or company name, you would capitalize it. For example: "I use Reflux brand antacids."
2. When it's a common noun:
* If "Reflux" refers to the medical condition, you would not capitalize it. For example: "He suffers from acid reflux."
3. When it's part of a medical term:
* If "Reflux" is part of a medical term, you would usually capitalize it. For example: "Gastroesophageal Reflux Disease (GERD)".
In summary:
* Capitalize "Reflux" if it's a proper noun.
* Don't capitalize "Reflux" if it's a common noun or part of a general medical description.
* Capitalize "Reflux" if it's part of a specific medical term.
Always consider the context of the sentence to determine the correct capitalization.