GLY

What it isAgonist at inhibitory glycine receptors and co-agonist at the NMDA glycine site; used for urologic irrigation.
Why this oneIts opposing inhibitory-spinal and excitatory-NMDA roles make glycine-site pharmacology unusually context dependent.
What limits itSystemic absorption of irrigation fluid can cause dilutional hyponatremia, hyperammonemia, encephalopathy, and transient blindness.
Principal riskAbsorbed irrigation fluid causes hyponatremia
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NO BOXED WARNINGS
| FDA dosing | Population | Start | Target | Max |
|---|---|---|---|---|
| Urologic irrigation during transurethral surgical procedures | Adults | 1.5% solution by transurethral instillation | Total volume solely at the surgeon's discretion | Not specified |
Renal Undefined
Hepatic Undefined
Container height above ~60 cm (2 ft) increases intravascular absorption of the irrigating fluid.
Available strengths
Pregnancy Pregnancy Category C — animal reproduction studies not conducted; unknown whether it can cause fetal harm. Give to a pregnant woman only if clearly needed.
Lactation Undefined
| Strength | #/mo | generic $/unit | CostPlus | |
|---|---|---|---|---|
| 1.5 g/100 mL | irrigant | per unit | not offered |
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