Generic Allegra (fexofenadine) 180mg, while generally well-tolerated, can interact with certain medications. Always inform your doctor or pharmacist about all medications, supplements, and herbal remedies you take, including over-the-counter drugs.
Here’s a summary of potential interactions:
| Antacids containing aluminum or magnesium | Reduced fexofenadine absorption. | Separate Allegra intake from antacid use by at least 2 hours. |
| Ketoconazole or other strong CYP3A4 inhibitors | Increased fexofenadine levels, potentially leading to side effects. | Your doctor may adjust your Allegra dosage or choose an alternative medication. |
| Erythromycin or other macrolide antibiotics | May slightly increase fexofenadine levels. | Monitor for side effects; your doctor may suggest dose adjustments. |
| Grapefruit juice | Potentially increases fexofenadine levels. | Avoid grapefruit juice while taking Allegra. |
This information is not exhaustive. Consult your healthcare professional for personalized advice regarding potential drug interactions with Allegra 180mg, especially if you have pre-existing health conditions or are taking multiple medications. They can help you manage potential risks and ensure safe and effective treatment.


