Ballicules › Drugs › Clonidine ER suspension
Pronunciation: KLOE-ni-deen
Mechanism of action: Clonidine ER suspension ballicule
Visual mnemonic: Clonidine ER suspension mascot“Clown dines On Yoda” orange plus signs → alpha-2 agonist
What it is Extended-release alpha-2 and imidazoline agonist suspension for ADHD; Approved ages (ADHD label): 6-17.
Why this one Duration of action 12-16 h (Carlat Table 1); the liquid formulation serves patients unable to swallow extended-release tablets.
What limits it Sedation, bradycardia, and hypotension can limit treatment; taper rather than stopping abruptly to prevent rebound hypertension.
Molecular structure: Clonidine ER suspension
FDA-approved for
FDA label
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FDA dosing Population Start Target Max
ADHD, as monotherapy or adjunctive to CNS stimulants Peds ≥6 yr 0.1 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 Gently shake ≥10 seconds before each dose; use the provided oral dosing dispenser and bottle adapter Take once daily at bedtime, with or without food Do NOT substitute for other clonidine products on a mg-per-mg basis (different PK) When discontinuing, taper by no more than 0.1 mg every 3–7 days to avoid rebound hypertension
Available strengths
ER susp 0.1 mg/mLtab 0.05, 0.1, 0.2, 0.3 mgER tab 0.1, 0.17 mgsol 0.02, 0.05 mg/mLpatch 0.1, 0.2, 0.3 mg/24 hrinj 100, 500 mcg/mLinj 0.1 mg/mL
Contraindications History of a hypersensitivity reaction to clonidine (reactions have included generalized rash, urticaria, and angioedema)
Cautions Hypotension/bradycardia (titrate slowly; monitor vitals) Somnolence/sedation (additive with CNS depressants; avoid alcohol) Rebound hypertension on abrupt discontinuation Allergic reactions (cross-sensitization with clonidine transdermal system) Cardiac conduction abnormalities (may worsen sinus node dysfunction/AV block)
Adverse reactions Somnolence Fatigue Irritability Nightmare Insomnia Constipation Dry mouth Decreased appetite Dizziness
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 #/mo generic $/unit brand $/unit CostPlus 0.1 mg/mL ER susp per unit — $13.38/mL not offered
Other forms: Clonidine (CATAPRES)
Principal risk Rebound hypertension on abrupt withdrawal
Classes and tags
Clinical profile
Therapeutic safety burden 2 / 4
Overdose danger 1 / 4
Weight-gain liability 0 / 4
Sedation liability 2 / 4
QT / Torsades 0 / 4
Direct muscarinic antagonism 0 / 4
Embryofetal risk 1 / 4
Legacy pregnancy category C
Defining liability Generally 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
Box: minimal PK interactions
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