Cyclopentolate and Phenylephrine
Medically reviewed by Drugs.com. Last updated on Jul 25, 2020.
(sye kloe PEN toe late & fen il EF rin)
- Phenylephrine and Cyclopentolate
Excipient information presented when available (limited, particularly for generics); consult specific product labeling.
Cyclomydril: Cyclopentolate hydrochloride 0.2% and phenylephrine hydrochloride 1% (2 mL, 5 mL)
Brand Names: U.S.
- Ophthalmic Agent, Mydriatic
The anticholinergic effects of cyclopentolate and the adrenergic effects of phenylephrine cause a greater mydriasis than produced by either agent alone, and cause little cycloplegia.
Onset of Action
Duration of Action
Use: Labeled Indications
Mydriasis: For the production of mydriasis.
Hypersensitivity to any component of the formulation; untreated narrow-angle glaucoma; untreated anatomically narrow angles.
Mydriasis: Ophthalmic: Instill 1 drop into the eye every 5 to 10 minutes.
Refer to adult dosing.
Mydriasis: Ophthalmic: Infants, Children, and Adolescents: Instill 1 drop into eye(s) at least 15 minutes prior to the examination (AAP 2008); may repeat every 5 to 10 minutes if needed
Finger pressure should be applied to lacrimal sac for 2 to 3 minutes after instillation to decrease risk of absorption and systemic reactions. Do not touch dropper to eye. Wash hands following administration. Contains benzalkonium chloride, which may be adsorbed by contact lenses; remove contacts prior to administration and wait 15 minutes before reinserting.
Store at 8°C to 25°C (46°F to 77°F).
Alpha1-Blockers: May diminish the vasoconstricting effect of Alpha1-Agonists. Similarly, Alpha1-Agonists may antagonize Alpha1-Blocker vasodilation. Monitor therapy
AtoMOXetine: May enhance the hypertensive effect of Sympathomimetics. AtoMOXetine may enhance the tachycardic effect of Sympathomimetics. Monitor therapy
Cannabinoid-Containing Products: May enhance the tachycardic effect of Sympathomimetics. Exceptions: Cannabidiol. Monitor therapy
Cocaine (Topical): May enhance the hypertensive effect of Sympathomimetics. Management: Consider alternatives to use of this combination when possible. Monitor closely for substantially increased blood pressure or heart rate and for any evidence of myocardial ischemia with concurrent use. Consider therapy modification
Doxofylline: Sympathomimetics may enhance the adverse/toxic effect of Doxofylline. Monitor therapy
Ergot Derivatives: May enhance the hypertensive effect of Alpha1-Agonists. Ergot Derivatives may enhance the vasoconstricting effect of Alpha1-Agonists. Exceptions: Ergoloid Mesylates; Nicergoline. Avoid combination
Guanethidine: May enhance the arrhythmogenic effect of Sympathomimetics. Guanethidine may enhance the hypertensive effect of Sympathomimetics. Monitor therapy
Iobenguane Radiopharmaceutical Products: Alpha1-Agonists may diminish the therapeutic effect of Iobenguane Radiopharmaceutical Products. Management: Discontinue all drugs that may inhibit or interfere with catecholamine transport or uptake for at least 5 biological half-lives before iobenguane administration. Do not administer these drugs until at least 7 days after each iobenguane dose. Avoid combination
Linezolid: May enhance the hypertensive effect of Sympathomimetics. Management: Reduce initial doses of sympathomimetic agents, and closely monitor for enhanced pressor response, in patients receiving linezolid. Specific dose adjustment recommendations are not presently available. Consider therapy modification
Monoamine Oxidase Inhibitors: May enhance the hypertensive effect of Alpha1-Agonists. While linezolid is expected to interact via this mechanism, management recommendations differ from other monoamine oxidase inhibitors. Refer to linezolid specific monographs for details. Exceptions: Linezolid. Avoid combination
Ozanimod: May enhance the hypertensive effect of Sympathomimetics. Management: Concomitant use of ozanimod with sympathomimetic agents is not recommended. If combined, monitor patients closely for the development of hypertension, including hypertensive crises. Consider therapy modification
Procarbazine: May enhance the adverse/toxic effect of Sympathomimetics. Management: Consider alternatives to this combination when possible. Procarbazine prescribing information states that this combination should be avoided. Consider therapy modification
Solriamfetol: Sympathomimetics may enhance the hypertensive effect of Solriamfetol. Sympathomimetics may enhance the tachycardic effect of Solriamfetol. Monitor therapy
Sympathomimetics: May enhance the adverse/toxic effect of other Sympathomimetics. Monitor therapy
Tedizolid: May enhance the hypertensive effect of Sympathomimetics. Tedizolid may enhance the tachycardic effect of Sympathomimetics. Monitor therapy
Tricyclic Antidepressants: May enhance the therapeutic effect of Alpha1-Agonists. Tricyclic Antidepressants may diminish the therapeutic effect of Alpha1-Agonists. Monitor therapy
See individual agents.
Concerns related to adverse effects:
• CNS effects: May cause CNS disturbances. Patients must be cautioned about performing hazardous activities (eg, operating machinery or driving) while pupils are dilated.
• Intraocular pressure: May cause a transient elevation in intraocular pressure.
• Cardiovascular effects: Use caution in patients with cardiovascular disease or hypertension.
• Down syndrome: Use caution in patients with Down syndrome.
• Glaucoma: Use caution in patients predisposed to angle-closure glaucoma.
• Hyperthyroidism: Use caution in patients with hyperthyroidism.
• Contact lens wearers: Contains benzalkonium chloride, which may be adsorbed by contact lenses; remove contacts prior to administration and wait 15 minutes before reinserting.
• Pediatric: May result in psychotic reactions and behavioral disturbances in children; risk may be increased with brain damage or spastic paralysis. Observe infants for at least 30 minutes following instillation. Feeding intolerance may occur in infants; withhold feeding for 4 hours after examination.
• Appropriate use: For topical ophthalmic use and short term administration only. To minimize systemic absorption, apply pressure over the lacrimal sac for 2 to 3 minutes after application.
Infants should be monitored for at least 30 minutes following application.
Animal reproduction studies have not been conducted with this combination.
What is this drug used for?
• It makes the eye pupils larger.
All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:
• Ocular burning sensation
• Blurred vision
• Sensitivity to lights
WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:
• Vision changes
• Eye pain
• Severe eye irritation
• Fast heartbeat
• Severe headache
• Trouble urinating
• Sensing things that seem real but are not
• Change in balance
• Abnormal gait
• Slurred speech
• Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
Note: This is not a comprehensive list of all side effects. Talk to your doctor if you have questions.
Consumer Information Use and Disclaimer: This information should not be used to decide whether or not to take this medicine or any other medicine. Only the healthcare provider has the knowledge and training to decide which medicines are right for a specific patient. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a limited summary of general information about the medicine's uses from the patient education leaflet and is not intended to be comprehensive. This limited summary does NOT include all information available about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to this medicine. This information is not intended to provide medical advice, diagnosis or treatment and does not replace information you receive from the healthcare provider. For a more detailed summary of information about the risks and benefits of using this medicine, please speak with your healthcare provider and review the entire patient education leaflet.
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More about cyclopentolate / phenylephrine ophthalmic
Other brands: Cyclomydril