Triamcinolone Acetonide (Sub-Tenon's) is an anti-inflammatory corticosteroid medicine given as an injection near the eye to treat certain eye conditions like uveitis and diabetic macular oedema.
| Drug class | Corticosteroid (Periocular Depot) |
|---|---|
| Type | Single |
| Forms | Sub-Tenon Injection |
| Common strength | 40 mg/mL |
| Common Indian brands | Kenacort, Tricort (used off-label periocularly) |
| Prescription status | Prescription (hospital use) |
What Triamcinolone Acetonide (Sub-Tenon's) is used for
Triamcinolone Acetonide (Sub-Tenon’s) is a powerful anti-inflammatory medicine used to treat specific eye conditions where inflammation or swelling affects the back part of the eye. It is particularly helpful in managing:
- Uveitic Macular Oedema: This is swelling at the macula (the central part of your retina responsible for sharp, detailed vision) caused by uveitis, an inflammation of the uvea (the middle layer of the eye).
- Diabetic Macular Oedema: This is swelling of the macula due to damage to blood vessels in the retina caused by diabetes. It can lead to blurred or distorted vision.
- Posterior Uveitis: Inflammation affecting the back part of the uvea, which can impact the retina and optic nerve.
- Intermediate Uveitis: Inflammation primarily affecting the vitreous (the jelly-like substance filling the eye) and the peripheral retina.
By reducing inflammation and swelling, this medicine aims to preserve and improve your vision, preventing further damage to the delicate structures of your eye. Your eye doctor will determine if this treatment is suitable for your specific condition after a thorough examination.
How it works
Triamcinolone Acetonide (Sub-Tenon’s) works as a corticosteroid, which is a strong anti-inflammatory medicine. When injected, it is placed in a specific area under a protective layer of tissue around your eyeball called Tenon’s capsule. This placement creates a ‘depot’ or reservoir of the medicine.
From this depot, the medicine is slowly released over several months, directly into the tissues of your eye. This targeted and sustained release helps to reduce inflammation and swelling in the affected parts of your eye, such as the macula or the uvea. Because it acts locally and continuously, it can effectively control chronic inflammation and swelling, which are often the root cause of vision problems in conditions like uveitis and diabetic macular oedema.
This method ensures that the medicine reaches the problem area directly and remains active for an extended period, providing long-lasting relief from inflammation and its associated symptoms, and helping to protect your vision.
How it’s used
Triamcinolone Acetonide (Sub-Tenon’s) is administered as a single injection directly near your eye, specifically under Tenon’s capsule. This procedure is performed by an eye specialist in a hospital or clinic setting. It is not a medicine you can administer yourself.
The injection is usually given after your eye has been numbed with local anaesthetic drops or injections to ensure your comfort. Your doctor will carefully clean the area around your eye before the injection to prevent infection.
After the injection, the medicine forms a depot that slowly releases the active ingredient over several months. This means you typically won’t need daily medication. Your eye doctor will monitor your condition and vision closely after the injection.
The effect of a single injection can last for approximately three months. If needed, your doctor may recommend repeating the injection after about three months, depending on your eye’s response and the ongoing needs of your condition. The decision to repeat the injection will always be made by your eye specialist based on your individual progress and eye health.
It is crucial to attend all follow-up appointments as advised by your doctor so they can check your eye pressure and overall eye health, and determine if further treatment is necessary.
Always follow your ophthalmologist’s exact instructions.
Brands available in India
- Kenacort
- Tricort (used off-label periocularly)
Brand availability and pricing vary; confirm with your pharmacist.
Important safety warning
STEROID — DO NOT SELF-MEDICATE. Unsupervised or prolonged use of steroid eye medication can cause steroid-induced glaucoma (silent, irreversible optic-nerve damage) and cataract, and can turn a viral or fungal eye infection into a sight-threatening one. Use only on an eye doctor's prescription, for the stated duration, with eye-pressure checks. Never repeat an old prescription for a red eye. This is given only by specialists in a hospital or clinic setting and is never for self-use.
Precautions & side effects
As with any medical procedure or medication, there are important precautions and potential side effects associated with Triamcinolone Acetonide (Sub-Tenon’s) injection. Your eye doctor will discuss these with you in detail before the procedure.
- Raised Intraocular Pressure (IOP): One of the most significant risks with steroid medications, including this injection, is an increase in the pressure inside your eye. This is often called steroid-induced glaucoma. If left untreated, high eye pressure can silently and irreversibly damage the optic nerve, leading to vision loss. Regular eye pressure checks are essential after receiving this injection.
- Cataract Formation: Prolonged or repeated use of steroid medications can increase the risk of developing cataracts, which is a clouding of the natural lens of your eye. This can lead to blurred vision.
- Ptosis: This refers to a drooping of the upper eyelid, which can sometimes occur after periocular injections. It is usually temporary.
- Infection Risk: Although rare, any injection carries a small risk of infection. Your doctor will take sterile precautions to minimise this risk.
- STEROID — DO NOT SELF-MEDICATE: This is a critical warning. Triamcinolone Acetonide (Sub-Tenon’s) is a potent steroid and must NEVER be self-administered or used without strict medical supervision. Unsupervised or prolonged use of any steroid eye medication can lead to severe and irreversible eye damage, including glaucoma and cataract. It can also worsen viral or fungal eye infections, turning them into sight-threatening conditions. This medicine is only given by specialists in a hospital or clinic setting and is never for self-use. Always use it only on an eye doctor’s prescription, for the stated duration, and with regular eye-pressure checks. Never repeat an old prescription for a red eye without consulting your doctor.
It is vital to inform your eye doctor about your complete medical history, including any other medications you are taking, allergies, or pre-existing eye conditions, especially glaucoma or a history of herpes simplex eye infections, before receiving this injection.
Understanding Your Eye Condition and Treatment
At Pristine Eye Hospitals, we understand that dealing with an eye condition can be concerning. When your eye doctor recommends an injection like Triamcinolone Acetonide (Sub-Tenon’s), it’s usually for conditions that involve inflammation or swelling deep within your eye. Conditions like uveitis (inflammation of the middle layer of the eye) or diabetic macular oedema (swelling at the back of the eye due to diabetes) can significantly affect your vision if not properly managed. The macula, a small but crucial part of your retina, is responsible for your sharp, central vision, allowing you to read, recognise faces, and see fine details. When it swells, your vision can become blurry or distorted. Uveitis, on the other hand, can cause redness, pain, light sensitivity, and blurry vision, and if left untreated, can lead to serious complications.
This specific treatment aims to deliver a powerful anti-inflammatory medicine directly to the affected area, helping to reduce swelling and inflammation. By controlling these processes, the goal is to prevent further damage to your eye, preserve your existing vision, and in many cases, improve your sight. It’s important to remember that managing these conditions is often a long-term process, and your commitment to follow-up appointments and adhering to your doctor’s advice is crucial for the best possible outcome.
General Eye Care and Hygiene
While Triamcinolone Acetonide (Sub-Tenon’s) is an injection and not a daily eye drop, maintaining good general eye hygiene is always important for overall eye health, especially when you are undergoing treatment for an eye condition. Always wash your hands thoroughly with soap and water before touching your eyes or the area around them. Avoid rubbing your eyes, especially after the injection, as this can irritate the area or potentially introduce germs. If you experience any discomfort, redness, or discharge from your eye after the injection, do not try to treat it yourself. Instead, contact your eye doctor immediately.
Protecting your eyes from dust, pollution, and harsh sunlight can also be beneficial. Wearing sunglasses when outdoors can help shield your eyes. If you wear contact lenses, your doctor will advise you on when it is safe to resume wearing them after the injection. Generally, it’s best to avoid contact lenses for a period immediately after any eye procedure to allow the eye to heal and to minimise the risk of infection. Always use fresh, sterile contact lens solution and follow proper cleaning and storage guidelines if you do wear them.
When to Seek Medical Help
After receiving a Triamcinolone Acetonide (Sub-Tenon’s) injection, it is vital to be aware of certain signs and symptoms that warrant immediate medical attention. While some mild discomfort or redness around the injection site is normal for a day or two, you should contact Pristine Eye Hospitals or your eye doctor without delay if you experience any of the following:
- Sudden, severe, or worsening eye pain.
- Significant decrease or change in your vision.
- New or worsening redness in your eye.
- Pus-like discharge from your eye.
- Extreme sensitivity to light (photophobia).
- Persistent headache or eye ache.
- Any new or unusual symptoms that concern you.
These symptoms could indicate a complication, such as an infection or a significant rise in eye pressure, which requires prompt evaluation and treatment. Never hesitate to reach out to your medical team if you have any concerns about your eye health, especially after an injection. Your eye doctor will schedule follow-up appointments to monitor your eye pressure and the effectiveness of the treatment. Attending these appointments is critical, even if your eye feels fine, as some complications like increased eye pressure can be ‘silent’ and not cause noticeable symptoms until significant damage has occurred. Regular check-ups ensure that any potential issues are identified and managed early to protect your vision.
Frequently asked questions
What is Triamcinolone Acetonide (Sub-Tenon's) used for?
Triamcinolone Acetonide (Sub-Tenon's) is an anti-inflammatory medicine used to treat specific eye conditions such as uveitic macular oedema, diabetic macular oedema, posterior uveitis, and intermediate uveitis. These conditions involve inflammation and swelling at the back of the eye that can affect vision.
How does Triamcinolone Acetonide (Sub-Tenon's) work?
This medicine is a corticosteroid that works by reducing inflammation and swelling in the eye. It is injected under Tenon's capsule, a protective layer around the eyeball, creating a depot. From this depot, the medicine is slowly released over several months, providing a long-lasting local anti-inflammatory effect directly to the affected eye tissues.
What are the common Indian brands for this medicine?
Common Indian brands for Triamcinolone Acetonide that are used off-label periocularly (near the eye) include Kenacort and Tricort.
How is Triamcinolone Acetonide (Sub-Tenon's) administered?
It is given as a single injection near the eye, specifically under Tenon's capsule, by an eye specialist in a hospital or clinic. It is not for self-administration. The injection's effect can last for about three months, and it may be repeated after this period if your doctor deems it necessary based on your condition.
Do I need a prescription for Triamcinolone Acetonide (Sub-Tenon's)?
Yes, Triamcinolone Acetonide (Sub-Tenon's) is a prescription-only medicine and is administered only by specialists in a hospital or clinic setting. It is never for self-use.
What are the key precautions I should be aware of?
Key precautions include the risk of raised intraocular pressure (eye pressure), which can lead to glaucoma, and the formation of cataracts. There is also a risk of ptosis (drooping eyelid). It is critical that this is a steroid and must never be self-medicated. Unsupervised use can cause irreversible optic nerve damage, cataracts, and worsen eye infections. Regular eye pressure checks are essential after the injection.
References
- Subconjunctival Triamcinolone Acetonide May Be a Treatment Option for Macular Edema – American Academy of Ophthalmology
- Eye Diseases – MedlinePlus
- Learn about eye health – National Eye Institute (NIH)
- Blindness and vision impairment – World Health Organization
- StatPearls – NCBI Bookshelf
Medically reviewed by Dr. C Jagadesh Reddy, Chief Surgeon: Cornea, Cataract and Refractive Surgery — last reviewed 2026-07-28.
This page is for general education only and is not a substitute for professional medical advice, diagnosis or treatment. Never self-medicate or reuse an old prescription. Always consult a qualified ophthalmologist before starting, changing or stopping any eye medicine.