What the FDA labels say about taking them together
Acetyl l-tyrosine, alanine and 15 other ingredients and tetracycline
Acetyl l-tyrosine, alanine and 15 other ingredients's FDA label of November 2, 2025 names tetracycline in its drug interactions section; the tetracycline label PlainMeds reads does not name acetyl l-tyrosine, alanine and 15 other ingredients. The acetyl l-tyrosine, alanine and 15 other ingredients label: “Drug Interactions Because of its antianabolic activity, concurrent administration of tetracycline may reduce the potential effects of amino acids infused with dextrose as part of a parenteral feeding regimen.”
Check it at the source: the acetyl l-tyrosine, alanine and 15 other ingredients FDA label on DailyMed (effective November 2, 2025); the tetracycline FDA label on DailyMed (effective March 18, 2025, Heritage Pharmaceuticals Inc. d/b/a Avet Pharmaceuticals Inc.).
What does the acetyl l-tyrosine, alanine and 15 other ingredients label say about tetracycline?
Acetyl l-tyrosine, alanine and 15 other ingredients label, drug interactionsDrug Interactions Because of its antianabolic activity, concurrent administration of tetracycline may reduce the potential effects of amino acids infused with dextrose as part of a parenteral feeding regimen.
Source: FDA drug label (Aminosyn II), ICU Medical Inc., effective November 2, 2025 (SPL set 5b426208-f090-4650-86c3-89040ba45c2d), via openFDA; the full label on DailyMed
What does the tetracycline label say about acetyl l-tyrosine, alanine and 15 other ingredients?
Tetracycline's label (effective March 18, 2025) does not name acetyl l-tyrosine, alanine and 15 other ingredients in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (tetracycline hydrochloride), Heritage Pharmaceuticals Inc. d/b/a Avet Pharmaceuticals Inc., effective March 18, 2025 (SPL set eaa5b1bd-0927-46e4-b941-32fcc492d258), 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
| Acetyl l-tyrosine, alanine and 15 other ingredients | Tetracycline | |
|---|---|---|
| Labeled for | n/a | Bacterial infections |
| Boxed warning | Yes | No |
| Pharmacy cost (NADAC) | n/a | $0.247 per capsule 250 mg capsule |
| Shortage now | Listed; available | No current entry |
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