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Clonidine ER suspension

ONYDA XR

Pronunciation: KLOE-ni-deen

Clonidine ER suspension ballicule: receptor binding, kinetics and half-life diagram
Mechanism of action: Clonidine ER suspension ballicule
Clonidine ER suspension ONYDA XR mascot mnemonic cartoon
Visual mnemonic: Clonidine ER suspension mascot
“Clown dines On Yoda”
orange plus signs → alpha-2 agonist

What it isExtended-release alpha-2 and imidazoline agonist suspension for ADHD; Approved ages (ADHD label): 6-17.

Why this oneDuration of action 12-16 h (Carlat Table 1); the liquid formulation serves patients unable to swallow extended-release tablets.

What limits itSedation, bradycardia, and hypotension can limit treatment; taper rather than stopping abruptly to prevent rebound hypertension.

Clonidine ER suspension molecular structure (skeletal formula)
Molecular structure: Clonidine ER suspension

FDA-approved for

FDA label

FDA dosingPopulationStartTargetMax
ADHD, as monotherapy or adjunctive to CNS stimulantsPeds ≥6 yr0.1 mg PO QHS (with or without food)0.4 mg QHS

Titration Increase by 0.1 mg/day at weekly intervals

Renal Adjust initial dose to degree of renal impairment; monitor for hypotension/bradycardia; no supplemental dose after routine hemodialysis

Hepatic Undefined

Instructions

Available strengths

Contraindications

Cautions

Adverse reactions

Pregnancy Prolonged clonidine experience has not identified a drug-associated risk of major birth defects or miscarriage

Lactation Clonidine present in human milk (relative infant dose 4.1–8.4%); monitor breastfed infant for hypotension/bradycardia (sedation, lethargy, poor feeding)

Cost

Clonidine ER suspension (ONYDA XR)
What pharmacies pay · NADAC 9/30/26
Strength#/mogeneric $/unitbrand $/unitCostPlus
0.1 mg/mLER suspper unit—$13.38/mLnot offered

Other forms: Clonidine (CATAPRES)

NO BOXED WARNINGS

Principal riskRebound hypertension on abrupt withdrawal

Classes and tags

Clinical profile

Therapeutic safety burden2 / 4
Overdose danger1 / 4
Weight-gain liability0 / 4
Sedation liability2 / 4
QT / Torsades0 / 4
Direct muscarinic antagonism0 / 4
Embryofetal risk1 / 4

Legacy pregnancy categoryC

Defining liabilityGenerally tolerated at therapeutic doses; clinically important risks are agent-specific and increase with interactions or organ impairment.

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Memory aids: interaction avatars

Clonidine ER suspension Box: minimal PK interactions avatar mnemonic
Box: minimal PK interactions

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