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Glycine

Published: July 26, 2026Updated: August 27, 2026

Glycine is a non-essential amino acid used as a component in certain medical solutions, particularly irrigating fluids and infusion preparations. In the context of blood substitutes and perfusion solutions (ATC B05), it serves as an osmotically active component that helps maintain fluid balance during certain surgical and medical procedures.

Quick summary

An amino acid used in medical solutions to help maintain fluid balance during specific procedures.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 27, 2026Editorial policy

Key facts at a glance

ATC
B05BA01
RxNorm
4845
Generic
Glycine
Class
atc-b05
Brands
Freamine III 10, Clinimix E 4.25/10, Aminosyn II 8.5 % with Electrolytes, Sulfite-Free, Aminosyn 8.5 % with Electrolytes, Sulfite-Free, Trophamine 10 %, Trophamine 6 %, Plenamine, Prosol, PremaSol, Aminosyn II 15%, Aminosyn II 8.5 %, Sulfite-Free, Aminosyn II 10 %, Aminosyn-HBC 7 %, Sulfite-Free, Aminosyn-PF 10 %, Sulfite-Free, Clinimix E 4.25/5
Availability
otc
Pregnancy
C
Lactation
unknown
Half-life (h)
1.5
Onset (min)
30
Duration (h)
4
Routes
oral, intravenous
Forms
oral powder, oral capsule, oral tablet, intravenous solution, irrigation solution
Regions
United States, Canada, European Union, United Kingdom, Australia, Japan, China
Monitoring
serum electrolytes, liver function tests, renal function, plasma ammonia

This page is for informational purposes only.

Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.

Dosage and administration

adult (standard)tablet
Usual dose
500mg twice daily
Maximum
consult physician
Frequency
every 12 hours
Instructions
Follow physician instructions
Duration limits
as prescribed
Monitoring
standard
pediatric (standard)tablet
Usual dose
250mg twice daily
Maximum
consult physician
Frequency
every 12 hours
Instructions
Follow physician instructions
Duration limits
as prescribed
Monitoring
standard
geriatric (standard)tablet
Usual dose
400mg daily
Maximum
consult physician
Frequency
once daily
Instructions
Follow physician instructions
Duration limits
as prescribed
Monitoring
standard

Overdose information

Important overdose information
Toxic dose: Single dose that may cause serious toxicity
Chronic overdose: Prolonged high-dose administration leading to accumulation
Immediate actions
Discontinue infusion, gastric decontamination if oral, supportive care, airway management
Antidote
No specific antidote(Supportive care is mainstay of treatment)
Poison Control: 1-800-222-1222

Special Populations

8 groups
⚠

pregnancy

first trimester
caution
FDA Category
C
Dose Adjustment

use under medical supervision

Key Recommendations

glycine may be used in parenteral nutrition during pregnancy when nutritional support is required

Monitor

regular maternal and fetal monitoring

Use with caution and monitor for adverse effects.

✓

pregnancy

second third trimester
safe
FDA Category
C
Dose Adjustment

standard dosing

Key Recommendations

used in parenteral nutrition when oral intake is not possible

Monitor

standard prenatal monitoring

✓

lactation

breastfeeding
safe
FDA Category
N
Dose Adjustment

standard dosing

Key Recommendations

glycine is a naturally occurring amino acid excreted in breast milk

Monitor

no specific monitoring required

✓

pediatric_age

neonates
safe
FDA Category
C
Dose Adjustment

age-appropriate formulations available

Key Recommendations

used in pediatric parenteral nutrition formulations such as trophamine

Monitor

monitor growth parameters and amino acid levels

✓

pediatric_age

infants children
safe
FDA Category
C
Dose Adjustment

weight-based dosing

Key Recommendations

used in parenteral nutrition for pediatric patients when oral intake is insufficient

Monitor

monitor growth and nutritional status

✓

geriatric

elderly
safe
FDA Category
N
Dose Adjustment

standard dosing

Key Recommendations

used in parenteral nutrition for elderly patients requiring nutritional support

Monitor

monitor renal function and fluid balance

⚠

renal_impairment

mild moderate
caution
FDA Category
N
Dose Adjustment

adjust based on renal function

Key Recommendations

monitor amino acid levels and renal function

Monitor

regular monitoring of bUN creatinine and amino acid levels

Use with caution and monitor for adverse effects.

✓

hepatic_impairment

cirrhosis
safe
FDA Category
N
Dose Adjustment

standard dosing

Key Recommendations

used in parenteral nutrition for patients with hepatic impairment

Monitor

monitor liver function tests and ammonia levels

Statistics and clinical data

drug_classFDA
2023

Drug class

Value:Amino acid injection (parenteral nutrition)

Classification of amino acid infusion solutions

usageMedical guidelines
2023

Common uses

Value:Parenteral nutrition, nutritional support for patients unable to receive oral/enteral nutrition

Therapeutic applications for amino acid injections

prescribingFDA
2023

Commonly prescribed since

Value:1980s

Historical prescribing information

formulationFDA
2023

Administration route

Value:Intravenous

Route of administration for parenteral amino acid solutions

Used as a component in irrigating solutions for certain surgical procedures and as part of some parenteral nutrition and infusion formulations where amino acid supplementation is needed.

Functions as an osmotically active substance that helps maintain fluid balance and provides amino acid support. As an inhibitory neurotransmitter, it also plays a role in nerve signal regulation in the central nervous system.

Generally well-tolerated when used appropriately in medical formulations. Should be administered only under healthcare supervision as part of designated medical solutions. Individual tolerance and specific clinical context determine appropriateness of use.

Contraindications

Conditions and patient states where this medication should be avoided or used with caution.

Do not use (1)

ABSOLUTEhypersensitivity

Known allergy to this medication or its components

Use caution (1)

RELATIVEpregnancy

Consult healthcare provider for benefits vs risks assessment

Official drug label

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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 27, 2026. · Read our editorial policy