Triamcinolone acetonide is a corticosteroid used in injectable form to reduce inflammation and immune activity. The injectable forms are used in different ways depending on the condition.
Common injectable forms and routes
- Intramuscular (IM): a systemic anti-inflammatory dose (brand names include Kenalog-40 and Kenalog-10; strengths are 40 mg/mL or 10 mg/mL). Used for widespread inflammatory or allergic conditions.
- Intra-articular: injected into a joint (for example knee) to reduce joint inflammation and pain from arthritis or bursitis.
- Intralesional: injected into skin lesions (such as keloids, psoriasis, eczema) to shrink lesions and reduce inflammation.
- Ophthalmic/intravitreal is also possible in some eye conditions, but that’s a specialist-use area.
Typical dosing (very general guidance; your clinician will tailor this)
- Intramuscular: doses vary widely (e.g., 40 mg or 80 mg given as a single dose or in divided doses) depending on condition and response.
- Intra-articular: commonly 5–40 mg per joint, depending on joint size and severity.
- Intralesional: small amounts per lesion, often 2–40 mg per lesion, depending on size and location.
What it’s used for
- Inflammation and pain from arthritis, tendinitis, bursitis, or other joint/soft-tissue conditions.
- Certain skin conditions (e.g., eczema, psoriasis, certain keloids or scar problems) when local control is needed.
- Some allergic or systemic inflammatory conditions when a faster or stronger response is needed.
Possible side effects
- Local (at the injection site): pain, soreness, infection (rare), skin thinning or lightening, or a temporary flare of pain after joint injection.
- Systemic (with higher or repeated doses): increased appetite, weight gain, mood changes, sleep problems, high blood sugar, high blood pressure, fluid retention, upset stomach, osteoporosis with long-term use, and potential suppression of the body's own cortisol production.
- Other considerations: increased risk of infection, slower wound healing, and in some cases tendon damage or joint cartilage effects with repeated intra-articular injections.
Important cautions
- Do not use if you have a known fungal infection in the area of injection or an active infection that isn’t being treated.
- Use with caution in diabetes, high blood pressure, osteoporosis, peptic ulcers, glaucoma or cataracts, mood disorders, or if you are pregnant or breastfeeding (benefits vs. risks must be discussed with a clinician).
- Repeated injections into the same joint can lead to tissue damage, infection, or cartilage problems; long-term systemic use can cause more extensive side effects.
- Live vaccines: corticosteroids can affect vaccine responses; discuss any planned vaccines with your clinician.
If you have a specific condition, route, or dose you were prescribed or are considering, tell me and I can tailor the information (uses, typical doses, and safety considerations) to that scenario. And if you’re currently being treated, always follow your clinician’s instructions and consult them with any questions or adverse effects.