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Amino Acids: uses, dosing, side effects & brands

Amino Acids is a medicine sold in the U.S. under 23 brand and generic names. Below: what the FDA label says, every product that contains it, what the pills look like, and its recall record.

By the pharmaranks editorial teamReviewed against the FDA (openFDA label, NDC Directory & Enforcement) sourcesUpdated Jul 24, 2026How we research

Key facts

Available as
Injectable · Solution
Sold as
23 products — Aminosyn II 10%, Aminosyn II 3.5% and Aminosyn II 5%, and others
Prescription?
Prescription only
Generic available?
Not in our catalog
Boxed warning
Boxed warning

How Aminosyn II 10% in Plastic Container is dosed

From the FDA label for Aminosyn II 10% in Plastic Container (application NDA020015). Other amino acids products — different forms, different strengths — are dosed differently. Follow the label for the one you were prescribed.

Each 100 mL of Aminosyn II contains: Amino Acids Nitrogen Aminosyn II 10% 10 g 1.53 g Aminosyn II 15% 15 g 2.30 g The total daily dose of the solution depends on the daily protein requirements and on the patient’s metabolic and clinical response. In many patients, provision of adequate calories in the form of hypertonic dextrose may require the administration of exogenous insulin to prevent hyperglycemia and glycosuria. To prevent rebound hypoglycemia, a solution containing 5% dextrose should be administered when hypertonic dextrose infusions are abruptly discontinued. Parenteral drug products should be inspected visually for particulate matter and discoloration prior to administration, whenever solution and container permit. COLOR VARIATION FROM PALE YELLOW TO YELLOW IS NORMAL AND DOES NOT ALTER EFFICACY. Some opacity of the plastic due to moisture absorption during the sterilization process may be observed. This is normal and does not affect the solution quality or safety. The opacity will diminish gradually. Aminosyn II in the 2000 mL flexible Pharmacy Bulk Package is designed for use with manual, gravity flow operations and automated gravimetric compounding devices for preparing intravenous nutritional admixtures. Admixtures must be stored under refrigeration and used within 24 hours of admixing. Peripheral Vein Nutritional Maintenance A mixture of Aminosyn II and dextrose…

Everything below is the FDA label for Aminosyn II 10% in Plastic Container (injectable). Amino Acids is also sold as solution, and those are different medicines to take — follow the label for the one you were prescribed.

Aminosyn II 10% in Plastic Container side effects

Peripheral Infusions A 3.5% to 5% solution of amino acids (without additives) is slightly hypertonic. Use of large peripheral veins, inline filters, and slowing the rate of infusion may reduce the incidence of local venous irritation. Electrolyte additives should be spread throughout the day. Irritating additive medications may need to be infused at another venous site. Generalized flushing, fever and nausea also have been reported during peripheral infusions of amino acid solutions.

Who shouldn’t take Aminosyn II 10% in Plastic Container

This preparation should not be used in patients with hepatic coma or metabolic disorders involving impaired nitrogen utilization.

Aminosyn II 10% in Plastic Container 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.

Every amino acids product we track (23)

Same active ingredient — different manufacturer, form, price and FDA recall record. That last one is what our independent score measures.

Amino Acids products
#DrugRatingPharmacy pays
170/100View →
270/100View →
370/100View →
470/100View →
570/100View →
670/100View →
770/100View →
870/100View →
960/100View →
1060/100View →

Combination products containing amino acids

A combination is a different drug — different dosing, different warnings. It is listed here so you can find it, not so you can substitute it.

What people report to the FDA about amino acids

The FDA Adverse Event Reporting System (FAERS) collects reports from patients and clinicians. It holds 4,410 reports naming amino acids, and the FDA flagged 92% of those reports as serious. The effects reported most often — leaving out reports about overdose, misuse or the condition being treated, which dominate the raw list for common medicines:

  • nausea397 reports
  • diarrhoea393 reports
  • general physical health deterioration352 reports
  • vomiting349 reports
  • pneumonia340 reports
  • headache308 reports
  • dyspnoea307 reports
  • pyrexia299 reports

Read these as a signal, not a rate. A report does not mean amino acids caused the effect — anyone can file one, and many describe people taking several medicines for several conditions. Crucially there is no denominator: FAERS does not record how many people took the drug, so these counts cannot be turned into “X% of patients” — a bigger number often just means a more widely used or more talked-about drug. Duplicates exist, and publicity drives reporting. For what is actually established, read the FDA label section above.

Source: openFDA drug/event (FAERS), retrieved July 25, 2026.

Related calculators

Frequently asked questions

What is Aminosyn II 10% in Plastic Container?

Aminosyn ™ II, Sulfite-Free, (an amino acid injection) is a sterile, nonpyrogenic solution for intravenous infusion. Aminosyn II is oxygen sensitive. The Pharmacy Bulk Package is a sterile dosage form which contains multiple single doses for use only in a pharmacy bulk admixture program. The formulations are described below: Essential Amino Acids (mg/100 mL) Aminosyn II 10% 15% Isoleucine 660 990 Leucine 1000 1500 Lysine (acetate)* 1050 1575 Methionine 172 258 Phenylalanine 298 447 Threonine 400 600 Tryptophan 200 300 Valine 500 750 *Amount cited is for lysine alone and does not include the acetate.

Can you take amino acids with other medicines?

It depends on the medicine. We check it against the FDA labels rather than guessing: our interaction checker searches each drug's own label for the other and quotes what it says, naming the section it came from. Run amino acids against whatever else you take — and remember that a label not naming a drug is not the same as that combination being safe.

What brand names is amino acids sold under?

We track 23 amino acids-containing products in the U.S.: Aminosyn II 10%, Aminosyn II 3.5%, Aminosyn II 5%, Aminosyn II 7%, Aminosyn II 8.5%, Aminosyn-Hbc 7%, Aminosyn-Hbc 7% in Plastic Container and Aminosyn-Rf 5.2%, and 15 more. They are the same active ingredient; they differ in form, manufacturer, price and FDA recall record.

What forms does amino acids come in?

Across the brands we track, amino acids is currently marketed as injectable and solution, per the FDA's National Drug Code Directory. Each form is dosed differently — follow the label for the exact product you were prescribed.

Is there a generic amino acids?

We do not currently list a generic-labelled amino acids product. That does not always mean none exists — it means none appears under a generic name in the FDA data we track. Ask your pharmacist.

Cite this page
APA
pharmaranks. (2026, July 24). Amino Acids: uses, dosing, side effects & brands. https://pharmaranks.com/drugs/amino-acids
MLA
“Amino Acids: uses, dosing, side effects & brands.” pharmaranks, 24 July 2026, https://pharmaranks.com/drugs/amino-acids.

We summarise public FDA and NIH sources — for a clinical claim, cite the primary source we link to as well.

Sources: FDA openFDA drug label, National Drug Code Directory, and Enforcement (recall) database. This page reproduces public FDA data and is not medical advice. Dosing is set by your prescriber.

Read the full FDA label for amino acids on DailyMed (NIH) ↗ — including its boxed warning in full.