What the FDA labels say about taking them together
Aminophylline and medroxyprogesterone
Aminophylline's FDA label of May 22, 2026 names medroxyprogesterone in its drug interactions section; the medroxyprogesterone labels PlainMeds reads (3) do not name aminophylline. The aminophylline label: “… isoniazid isradipine influenza vaccine ketoconazole; lomefloxacin mebendazole medroxyprogesterone methylprednisolone metronidazole metoprolol nadolol nifedipine nizatidine norfloxacin ofloxacin omeprazole prednisone …”
Check it at the source: the aminophylline FDA label on DailyMed (effective May 22, 2026, Hospira, Inc.); the medroxyprogesterone FDA label on DailyMed (effective June 29, 2026, Pharmacia & Upjohn Company LLC).
What does the aminophylline label say about medroxyprogesterone?
Aminophylline label, drug interactionsalbuterol, systemic and inhaled amoxicillin ampicillin, with or without sulbactam atenolol azithromycin caffeine, dietary ingestion cefaclor co-trimoxazole (trimethoprim and sulfamethoxazole) diltiazem dirithromycin enflurane famotidine felodipine finasteride hydrocortisone isoflurane isoniazid isradipine influenza vaccine ketoconazole; lomefloxacin mebendazole medroxyprogesterone methylprednisolone metronidazole metoprolol nadolol nifedipine nizatidine norfloxacin ofloxacin omeprazole prednisone, prednisolone ranitidine rifabutin roxithromycin sorbitol (purgative doses do not inhibit theophylline absorption) sucralfate terbutaline, systemic terfenadine tetracycline tocainide
Source: FDA drug label (Aminophylline), Hospira, Inc., effective May 22, 2026 (SPL set 9a663ef3-881f-48bd-2689-3713b24545c2), via openFDA; the full label on DailyMed
What does the medroxyprogesterone label say about aminophylline?
Medroxyprogesterone's label (effective June 29, 2026) and its 2 other brand-application labels do not name aminophylline in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Provera), NDA011839 (Pfizer), as published by Pharmacia & Upjohn Company LLC, effective June 29, 2026 (SPL set a586be28-96af-4fed-a13f-9b94fd4c7405), via openFDA; the full label on DailyMed
These are the labels' own sentences. PlainMeds does not grade interactions; a pharmacist or prescriber can say what they mean for one person's medicines.
Both medicines on the record
| Aminophylline | Medroxyprogesterone | |
|---|---|---|
| Labeled for | Asthma | Birth control, Pain |
| Boxed warning | No | Yes |
| Pharmacy cost (NADAC) | n/a | $22.85 per mL 150 mg/mL |
| Shortage now | No current entry | A presentation being discontinued |
Source: FDA NDC Directory, CMS NADAC of October 7, 2026 and the FDA Drug Shortage Database (FDA files October 8, 2026)
What next?
- Check more medicines together
- up to five at once