Short answer: Both are room-temperature tablets; neither label gives a fridge instruction. Aromasin section 16 says 77°F (25°C) with excursions to 59-86°F (15-30°C), while its Patient Information says 68°F to 77°F (20°C to 25°C). Tamoxifen (Mylan label) is stored at 68° to 77°F (20° to 25°C), protected from light, and away from excessive heat over 104°F (40°C).
Aromasin (exemestane 25 mg) is an aromatase inhibitor; tamoxifen works differently but treats the same kinds of breast cancer. This page uses the Mylan tamoxifen label; other makers carry their own.
| Question | Aromasin | Tamoxifen tablets (Mylan) |
|---|---|---|
| Temperature | Store at 25°C (77ºF) | 20° to 25°C (68° to 77°F) |
| Excursions | 15°–30°C (59°–86°F) | Not stated |
| Heat | Not stated | Avoid excessive heat (over 104°F/40°C) |
| Light | Not stated | Protect from light; dispensed in a tight, light-resistant container |
| Container | HDPE bottle of 30 with a child-resistant screw cap | Bottles of 60 (10 mg) or 30 (20 mg); bottle label: keep container tightly closed |
| Patient leaflet | Room temperature 68°F to 77°F (20°C to 25°C) | The Medication Guide has no storage section |
| Refrigerator | Not stated | Not stated |
Section 16: “Store at 25°C (77ºF); excursions permitted to 15°–30°C (59°–86°F) [see USP Controlled Room Temperature].” Patient Information: “Store AROMASIN at room temperature 68°F to 77°F (20°C to 25°C).” The label does not explain the difference. Keeping it between 68°F and 77°F satisfies both.
How Supplied: “Store at 20° to 25°C (68° to 77°F). [See USP Controlled Room Temperature.]” “Avoid excessive heat (over 104°F/40°C).” “Protect from light.” “Dispense in a tight, light-resistant container as defined in the USP using a child-resistant closure.” The bottle label repeats this and adds “Keep container tightly closed.” The Medication Guide says nothing about storage.
They have their own pages: Arimidex (68-77°F, nothing else stated) and Femara (68-77°F, excursions 59-86°F).
Dosing: Aromasin and tamoxifen. Missed a dose: Aromasin and tamoxifen. Side effects: Aromasin and tamoxifen. Molecules: exemestane and tamoxifen. Comparisons: Aromasin vs tamoxifen and Femara vs Aromasin.
No ice pack is needed. Keep both in their bottles in your carry-on and out of a hot car; tamoxifen stays in its light-resistant bottle, and its label names 104°F (40°C) as excessive heat.