Cortisol

Quick links to important sections

Medically reviewed

Marina Burgos

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Cortisol

Prednisolone Acetate: A Synthetic Glucocorticoid Defined

Property Description
Active ingredient Prednisolone Acetate (an ester of Prednisolone)
Form Ophthalmic suspension or solution
Pharmacological class Corticosteroid / Glucocorticoid
Origin Synthetic derivative

Prednisolone Acetate is a powerful synthetic corticosteroid that acts as a potent anti-inflammatory agent, designed to chemically mimic the actions of the natural stress hormone, cortisol (hydrocortisone), which is physiologically produced by the body’s adrenal glands. It belongs to the broad pharmacological class of glucocorticoids, which are characterized by their ability to regulate inflammatory and immune responses. This drug is utilized for its effectiveness in suppressing acute localized inflammation.

Unlike natural cortisol, Prednisolone Acetate is a manufactured derivative engineered for enhanced potency and more localized action than its naturally occurring counterpart. The substance is structurally characterized as the 21-acetate ester of prednisolone, a modification that influences its properties for specific pharmaceutical applications.


What Type of Medicine is Prednisolone Acetate?

This highly effective adrenocorticoid is most commonly prepared as a sterile ophthalmic suspension or an ophthalmic solution, designed exclusively for the topical ophthalmic route of administration. This pharmaceutical form is crucial for delivering the active component, Prednisolone Acetate, directly to the targeted ocular tissues. It functions as a powerful anti-inflammatory agent and immunosuppressant.

By acting as a potent receptor agonist, the drug's core purpose is the rapid and effective suppression of the body’s inflammatory and immune-driven reactions, helping mitigate symptoms such as swelling and pain that arise from an excessive or unchecked inflammatory response. Synthetic glucocorticoids are designed to exhibit a significantly greater anti-inflammatory effect compared to the natural prototype. This medicine therefore offers a strong suppressive effect on localized inflammation.

What side effects are possible with Cortisol?

Possible Side Effects and Safety Information

The official safety profile for Prednisolone Acetate ophthalmic suspension is structured around potential localized ocular complications arising from the use of a potent corticosteroid, particularly with prolonged exposure. Regulatory documents identify key adverse reactions related to the length of treatment.


Documented Adverse Reactions and Serious Concerns

The most clinically significant adverse reactions, as documented in regulatory sources, pertain to the eye. Transient symptoms like eye pain and blurred vision may be experienced, but more serious outcomes are associated with extended use:

  • Elevated Intraocular Pressure (IOP): This is a primary safety concern, which can potentially lead to glaucoma, causing damage to the optic nerve and affecting visual acuity and fields.
  • Posterior Subcapsular Cataract Formation: The development of cataracts is a documented risk associated with prolonged corticosteroid application.
  • Secondary Ocular Infection: The drug's immunosuppressive nature may increase the hazard of developing secondary bacterial, viral, or fungal infections of the eye, or mask existing infections.
  • Ocular Perforation: Use is restricted in conditions that cause thinning of the cornea or sclera due to the increased risk of globe perforation.

Time-Related Safety and Specific Populations

The risk of developing serious outcomes like IOP elevation and cataract formation is explicitly linked to prolonged use. Consequently, regulatory labels define monitoring requirements, such as the need for routine IOP checks when the medicine is used for ten days or longer.

For Pediatric Use, there is a documented potential for systemic effects, including adrenal suppression, especially with high-dose, prolonged treatment, which underscores the need for careful monitoring in this population. Safety notes also address the potential for adverse effects in nursing infants following maternal systemic absorption.

Overdose and Emergency Response

Overdose and When to Seek Help

Official regulatory information indicates that acute overdosage is generally not expected to cause acute problems when Prednisolone Acetate ophthalmic suspension is administered via the ocular route. Regulators primarily address the scenario of accidental oral ingestion. If the product is swallowed, official guidance mandates that the patient seek emergency medical attention and drink fluids to dilute the substance. There is no specific antidote known documented in the regulatory labeling for this type of overdose; management remains supportive and symptomatic.

Regulators note that prolonged or excessive topical use can lead to the development of systemic hypercorticoidism (Cushing's syndrome) and adrenal suppression, a risk particularly noted in susceptible populations like infants and children.

Urgent medical attention is required if signs of a severe allergic reaction or hypersensitivity develop. Furthermore, a healthcare professional must be consulted if eye inflammation or pain persists longer than 48 hours or becomes aggravated. This mandated trigger ensures prompt re-evaluation of the underlying condition, as a lack of improvement may indicate a masked or enhanced infection.

Therapeutic Uses of Cortisol

What Prednisolone Acetate Treats: Main Uses and Benefits

The primary therapeutic role of Prednisolone Acetate ophthalmic suspension is to provide localized anti-inflammatory support, generally used when symptoms create noticeable interference with visual stability and comfort. The medication is indicated for the treatment of steroid-responsive inflammation of the palpebral and bulbar conjunctiva, cornea, and anterior segment of the globe.


Managing Acute Eye Inflammation and Discomfort

This medicine is applicable within conditions characterized by periods of heightened symptoms, such as iritis, uveitis, keratitis, and certain cases of allergic conjunctivitis. It plays a role in managing symptom clusters that manifest as burning, stinging, eye redness, and swelling. In clinical scenarios, it is commonly used during the recovery phase following procedures like cataract surgery and in the wake of ocular trauma.

“This anti-inflammatory support helps ease the overall symptom burden and contributes to improved comfort during acute episodes.”

This supportive treatment assists with maintaining functional stability and supports general well-being, helping patients cope more steadily with symptom fluctuations and contributing to easing the overall symptom load.


Quick Fact: Relief for Ocular Swelling and Redness

Eligibility and Restrictions for Use

The eligibility profile for Prednisolone Acetate Ophthalmic Suspension is strictly defined by regulatory bodies based on infection status, pre-existing conditions, and age-group data.


Contraindications (Must Not Use)

The medicine is absolutely contraindicated in individuals with a known or suspected hypersensitivity to the drug or any component of the preparation. It must not be used in patients with specific ocular infections, including most viral diseases of the cornea and conjunctiva (such as epithelial herpes simplex keratitis), mycobacterial infection (tuberculosis of the eye), fungal diseases of the ocular structures, or acute untreated purulent ocular infections.


Eligibility Status by Population

Population Regulatory Status
Adults & Geriatrics Use is established for steroid-responsive inflammation.
Children (Paediatric) Use is not established and not recommended due to insufficient safety and efficacy data in some regulatory regions.
Pregnancy Should be used only if the potential benefit justifies the potential risk to the fetus.
Lactation Use is not recommended due to potential adverse effects on the nursing infant from systemic absorption.

Conditional Use Requirements

The official labeling requires use with great caution for patients with pre-existing ocular conditions such as glaucoma or a history of Herpes Simplex. Furthermore, patients treated for ten days or longer must undergo routine monitoring of intraocular pressure, and caution is advised for patients with thin corneal tissue or those recently undergoing cataract surgery.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The interaction profile for this ophthalmic suspension is primarily defined by a specific pharmacokinetic mechanism documented in official regulatory labeling.

Interaction Scope

Category Documented Entity / Outcome
Medicinal Product Class CYP3A Inhibitors (Cytochrome P450 3A Inhibitors)
Specific Interacting Substance Cobicistat-containing products
Mechanistic Basis Pharmacokinetic interaction involving decreased corticosteroid clearance.
Exposure Consequence Increased risk of systemic side-effects due to elevated systemic exposure.

Regulatory Restriction and Monitoring

Co-treatment with potent CYP3A inhibitors is formally documented to decrease the clearance of the corticosteroid component, a finding that results in specific regulatory guidance. Due to this increased systemic exposure, the combination is designated as one that should be avoided unless the prescribing authority explicitly determines that the clinical benefit outweighs the documented increased systemic risk. When co-administration is required, official documents mandate patient monitoring for potential systemic corticosteroid side effects. No interactions with food, alcohol, or herbal products are documented in the official prescribing information for this topical formulation.

Official Interaction Statements

  • Co-treatment with CYP3A inhibitors is documented to decrease the clearance of the corticosteroid.
  • The co-administration is expected to increase the risk of systemic side-effects.
  • The combination must be avoided unless strictly necessary, and monitoring for systemic side effects is required in such cases.

Mechanism of Action

Genomic Control by Glucocorticoid Receptor ( GR) Agonism

This mechanism begins when the active steroid binds to the intracellular GR, initiating a process of genomic reprogramming. The receptor complex suppresses the activity of pro-inflammatory transcription factors like NF-kappa B (transrepression) while simultaneously activating genes for anti-inflammatory proteins (transactivation). This action causes significant down-regulation of pro-inflammatory protein and signaling molecule synthesis.


Upstream Inhibition of Inflammatory Mediators

This domain focuses on inhibition of the Arachidonic Acid Cascade. The GR mechanism causes the production of the protein Lipocortin-1, which then directly inhibits the PLA2 enzyme. By blocking PLA2, the drug restricts the release of precursors for inflammatory lipid mediators like prostaglandins and leukotrienes. This upstream block is mechanistically associated with a decreased rate of extravasation and local vasodilation.


️ Modulation of Cellular Trafficking

The drug’s molecular actions result in a crucial physiological effect by modifying the process of immune cell mobilization. The mechanism suppresses the expression of cellular adhesion molecules, effectively limiting the ability of inflammatory white blood cells (like neutrophils and T-cells) to exit the bloodstream and infiltrate the affected tissue. This action restricts cellular accumulation and migration patterns associated with the inflammatory response.

Dosage and Administration Information

How to Use Prednisolone Acetate

The administration of prednisolone acetate ophthalmic preparations is guided by precise instructions to ensure proper application and dosing. The medicine is strictly limited to the topical ophthalmic instillation route, meaning it is applied as drops directly into the conjunctival sac. It is not for injection or oral use.

Official Administration Schedule and Tapering

Feature Official Usage Principle
Dosing Range Instillation of one to two drops of the 0.12% or 1% suspension/solution.
Frequency Pattern Typically administered two to four times daily, with the option to increase frequency up to every hour during the first 24-48 hours.
Duration Logic The dosage is gradually reduced (tapered) when a favorable response is observed, and therapy should not be discontinued prematurely.
Procedural Constraint Use for 10 days or longer requires patient re-evaluation and typically involves monitoring of intraocular pressure.

Specific Usage Requirements

If using the suspension formulation, the bottle must be shaken well immediately before each use to ensure proper dispersion of the active ingredient. To help limit potential systemic absorption, the prescriber may advise pressing lightly on the lacrimal sac (punctal occlusion) for one minute following instillation. Patients using soft contact lenses must remove them before application and may reinsert them 15 minutes after the dose. Dosing for older adults follows the standard adult regimen, while safety and efficacy in pediatric patients have not been established.

Recent Clinical Evidence

Evidence for General Inflammation and Ocular Surgery

Research evidence for Prednisolone Acetate Ophthalmic Suspension (a synthetic glucocorticoid) includes historical adequate and well-controlled studies and regulatory reviews. Research examined conditions characterized by fluctuating inflammatory states in the anterior eye segment, such as keratitis and conjunctivitis, monitoring outcomes linked to inflammatory or irritative states like swelling and redness. More recent evidence, primarily from short-term Randomized Controlled Trials (RCTs) and Meta-Analyses, focuses on inflammation following ocular procedures, such as cataract surgery. These trials monitored highly specific, objective outcomes related to the acute inflammatory process. This included the measured change in inflammatory cells (AC cells) and protein deposits (AC flare) in the anterior chamber, typically using subjective grading scales, and monitored changes in visual acuity and Intraocular Pressure (IOP).

Follow-up Durations, Populations, and Study Limitations

The follow-up durations for clinical evaluation studies are generally limited, focusing on the acute phase (up to one month). Long-term effects and sustained symptom stability are not fully established. Key limitations include the reliance on subjective grading scales for primary outcomes and heterogeneity across trial protocols, which means evidence quality varies across studies. Data was evaluated to support extrapolation of study findings to the pediatric population, and older adults were routinely included. However, specific data for groups with comorbidities remain insufficient. The overall research provides context but not individual predictions, and findings describe group patterns reflective of the populations studied.

Key Studies & References

  1. Efficacy and Safety of Prednisolone Acetate Ophthalmic Suspension, 1%, for the Treatment of Inflammation Following Cataract Extraction (ClinicalTrials.gov Identifier: NCT00170729)

Frequently Asked Questions (FAQ)

Common questions about Cortisol (FAQ)


Q: What is the main reason doctors prescribe Cortisol?

Regulatory documents state that Cortisol (hydrocortisone) tablets are primarily used as replacement therapy for people whose adrenal glands do not produce enough of the hormone, such as in Addison's disease. The medicine is also prescribed for its strong anti-inflammatory effects to manage a variety of disorders affecting different organ systems, including specific types of arthritis, allergies, and blood conditions.

Q: Does Cortisol have any uses outside of treating low cortisol levels?

Yes. Official documents indicate that hydrocortisone tablets are prescribed for numerous conditions beyond just replacement therapy for low cortisol. The drug’s potent anti-inflammatory action makes it suitable for describing the treatment of certain rheumatic, allergic, dermatologic, and blood disorders.

Q: Does Cortisol cause weight gain?

Regulatory documents list increased appetite and weight gain as potential side effects of taking hydrocortisone. For individuals using the drug long-term, official information notes the risk of developing Cushingoid features, which may involve changes in the way fat is distributed on the body.

Q: Can Cortisol affect sleep?

Official patient information notes that taking this medication may be associated with effects on the central nervous system. These effects can include trouble sleeping (insomnia) and a feeling of restlessness.

Q: Does Cortisol affect blood sugar levels?

Yes, official safety information indicates that this drug can cause various metabolic changes, including increased blood sugar (hyperglycemia). For people with pre-existing diabetes, official documents indicate that blood sugar monitoring may be necessary during treatment.

Q: Is there a generic version of Cortisol available?

Yes. According to official labeling and regulatory records, the active ingredient, hydrocortisone, is available in multiple generic tablet formulations from various manufacturers, alongside brand-name products.

Q: Is Cortisol ever used for conditions other than Addison's disease?

Yes. Cortisol is indicated for use in replacement therapy for adrenocortical deficiency, but is also prescribed for its anti-inflammatory effects in conditions like certain types of colitis, severe asthma, and selected dermatologic or hematologic disorders.

Q: Is Cortisol known to cause mood changes or anxiety?

Yes, mood changes are documented in official sources as a potential adverse reaction. These can include feelings of euphoria, changes in mood, mental depression, restlessness, and anxiety.

Q: Does taking Cortisol affect bone density?

Official adverse reaction information states that long-term use of corticosteroids is associated with an increased risk of bone-related effects. These include osteoporosis (weak or fragile bones) and an increased risk of vertebral compression fractures.

Q: Why do official documents sometimes refer to Cortisol as replacement therapy?

Official documents describe naturally occurring glucocorticoids, such as cortisol (hydrocortisone), as being used for replacement therapy in deficiency states. This refers to conditions where the body's adrenal glands do not naturally produce enough of these essential hormones.

Q: Is it normal to have mild headaches when first starting Cortisol?

Some official patient information notes that headaches are listed as a possible side effect of hydrocortisone treatment.

Q: Can Cortisol be taken by people with high blood pressure?

Official warnings note that hydrocortisone can cause elevation of blood pressure and may cause the body to retain salt and water. The drug is documented for use under cautious conditions for individuals with pre-existing hypertension or congestive heart failure.

Q: What should I do if I miss taking Cortisol?

Patient guidelines often describe a procedure for missed doses: if a dose is forgotten, it is usually taken as soon as remembered, unless the next dose is approaching. In that case, the missed dose is typically skipped, and the regular schedule is continued. Official information advises against taking double doses.

Q: Are there specific times of day Cortisol is generally taken?

For replacement therapy, the dosage is often split into two or more daily doses, with the first dose in the morning sometimes being the largest. This dosing pattern is typically used to help mimic the body's natural circadian rhythm of cortisol production.

Q: Does the evidence support the use of Cortisol for adrenal insufficiency?

Yes. Regulatory documents explicitly state that naturally occurring glucocorticoids, such as hydrocortisone, are used for replacement therapy in adrenocortical deficiency states. This application is a recognized and established indication.

Q: Why is it important to carry emergency information when taking Cortisol?

Patients on hydrocortisone for adrenal insufficiency are often advised to carry a steroid emergency card. This is often related to the need for temporary adjustments to steroid treatment during times of physical stress (like injury or fever) to prevent a serious complication known as an adrenal crisis.

Q: What is the typical duration of action for a Cortisol dose?

According to pharmacokinetic information, hydrocortisone has a short duration of action. After an immediate-release tablet is taken, the drug typically remains active in the blood circulation for about four to six hours.

Q: Are there any lifestyle changes recommended when taking Cortisol?

Official precautions advise that when taking average or large doses of hydrocortisone, dietary changes may be necessary due to the drug's effect on salt and water retention. Official precautions note that, due to the drug's effect on salt retention, procedures such as dietary salt restriction and potassium supplementation may be considered necessary.

Q: Why do official sources mention the risk of adrenal crisis when taking Cortisol?

The risk is mentioned because the sudden stoppage of treatment or insufficient coverage during physical stress may be associated with the onset of an adrenal crisis, a severe complication of adrenal insufficiency. This complication can be life-threatening.

Q: Are there any specific warnings for people with diabetes taking Cortisol?

Yes. Official precautions state that for individuals with diabetes, close monitoring may be required during hydrocortisone treatment. This is because the medication may cause or worsen high blood sugar levels (hyperglycemia).

Q: Are there any long-term effects of taking Cortisol?

Official warnings indicate that long-term use is associated with several potential effects. These include an increased risk of osteoporosis, formation of cataracts in the eye, and the development of a Cushingoid state (which refers to certain changes in appearance linked to high steroid exposure).

Q: Are there any common over-the-counter medicines that interact with Cortisol?

Official information notes that a wide variety of medicines can affect how hydrocortisone works. The label includes warnings about potential interactions with specific non-prescription substances like salicylates (a class that includes aspirin) and certain medicines for fungal infections.

Q: Are there specific vitamins or supplements that interact with Cortisol?

Official information advises patients to inform their doctor about all products they are taking. While general supplements are often not covered in detail, this comprehensive warning specifically includes herbal remedies, vitamins, and supplements.

Q: What are the typical storage guidelines for Cortisol tablets?

Cortisol tablets are typically directed to be stored at controlled room temperature (e.g., 20 C to 25 C), away from moisture, and kept in their original container.

Q: Are there different forms of Cortisol medication (e.g., tablets, injection)?

The active ingredient, hydrocortisone, is available in multiple pharmaceutical forms beyond the tablet. This includes oral granules and preparations for injection (such as hydrocortisone sodium succinate) intended for use in emergency situations or when oral administration is not possible.

Q: Does Cortisol treatment require regular blood tests?

Official precautions state that patients receiving treatment over a long period may require monitoring. This can involve blood or urine tests at regular check-ups to monitor for potential unwanted effects of the treatment.

Q: Does Cortisol interact with birth control pills?

Official interaction information notes that substances like estrogens, which are found in many oral contraceptive products, can potentially decrease the clearance of corticosteroids. This reduced clearance may increase the effects of the hydrocortisone.

How should Cortisol be stored and disposed of?

Storage and Disposal of Prednisolone Acetate Ophthalmic Suspension

The storage and handling of this synthetic glucocorticoid suspension must adhere to official regulatory requirements to ensure stability and safety.


Storage Requirements

Requirement Official Instruction
Temperature Store at controlled room temperature, typically 15 C to 25 C.
Protection Protect from freezing. Must be kept in the original container and tightly closed.
Handling The suspension must be shaken well before using to ensure uniform dispersion.
Child Safety Store the medication out of the reach of children.

Disposal Instructions

Unused or expired product should be discarded following local official guidelines. The preferred method is using a medicine take-back program. If unavailable, the medication should be mixed with an unappealing substance, placed in a sealed bag, and disposed of with household trash. Flushing down the toilet is generally not recommended.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

Available in countries:

Equivalent of Cortisol found in:

A-Z Index: