Steroids are administered through at least seven different routes depending on the condition being treated: applied to the skin, swallowed as pills, inhaled into the lungs, sprayed into the nose, injected into muscles or joints, delivered through an IV, or dropped into the eyes and ears. The method matters because it determines how much of the drug reaches the problem area, how quickly it works, and what side effects you might experience.
Topical Steroids: Creams, Ointments, and Gels
Topical corticosteroids are the most widely prescribed form. They treat skin conditions like eczema, psoriasis, and dermatitis by reducing inflammation right where it’s needed. In the United States, these products are ranked across seven potency classes, from Class I (the strongest) down to Class VII (the mildest). Over-the-counter hydrocortisone cream at 1% sits at the bottom of that scale, while prescription-only formulas at the top are roughly 600 times more potent.
Your doctor chooses the potency based on where the problem is on your body. Thin-skinned areas like the face, eyelids, and groin absorb more medication, so they typically get milder formulas. Thicker skin on the palms and soles may need a stronger class to get the drug through.
How much you apply matters too. A measurement called the fingertip unit helps keep things consistent: one fingertip unit equals about 0.5 grams, which is the amount squeezed from the tip of your index finger to the first crease. That’s roughly enough to cover an area twice the size of your palm.
Oral Steroids: Pills and Tablets
When inflammation is widespread or severe, steroids are taken by mouth. Prednisone, prednisolone, methylprednisolone, and dexamethasone are the most common. These drugs absorb well from the gut, with 80 to 100% of the dose reaching the bloodstream for most formulations. Dexamethasone is slightly lower, at 60 to 90%. The exception is budesonide, which has only about 10% bioavailability in oral form because the liver breaks most of it down before it circulates, making it useful for targeting gut inflammation specifically.
Oral steroids work quickly but leave the body fast. Most have an elimination half-life of two to three hours, meaning the active drug clears within half a day, though the anti-inflammatory effects last longer than the drug itself.
The biggest practical concern with oral steroids is how you stop taking them. If you’ve been on them for more than a couple of weeks, your body dials down its own cortisol production. Stopping abruptly can leave you in a state of adrenal insufficiency, with fatigue, dizziness, nausea, and muscle pain. To avoid this, doses are tapered in stages. A typical approach starts by cutting 5 to 10 mg per week from high doses (above 20 mg), then slowing to 2.5 mg reductions every two weeks once you’re below 10 mg. Near the finish line, around 5 mg per day, the taper becomes even more gradual, sometimes stretching over several additional weeks to give your adrenal glands time to wake back up.
Inhaled and Intranasal Steroids
Inhaled corticosteroids are the backbone of daily asthma and COPD management. They deliver medication directly to the airways, which keeps doses low and limits the amount that reaches the rest of your body. Two main devices handle this job, and they require very different breathing techniques.
A metered-dose inhaler (MDI) uses a pressurized canister to push a measured puff of medication out. You need to coordinate pressing the canister and breathing in at the same time, inhaling slowly and deeply over about four to five seconds. A dry powder inhaler (DPI) contains no propellant. Instead, your own breath pulls the powdered drug into your lungs, so you inhale fast and forcefully from the very start. DPIs don’t require the tricky hand-breath coordination, which makes them easier for many people, but they do need a strong enough inhalation to break up the powder and carry it deep into the lungs.
Intranasal steroid sprays treat allergies, sinusitis, and nasal polyps. Proper technique reduces side effects like nosebleeds and irritation. The key steps: blow your nose first, hold the bottle with the hand opposite the nostril you’re spraying, tilt your head slightly forward (not back), and aim the nozzle slightly outward, away from the center wall of your nose. That last detail is the most important. Spraying toward the septum (the dividing wall) instead of away from it is linked to a 3.6 times higher risk of side effects like nosebleeds and nasal irritation.
Joint and Muscle Injections
Steroid injections placed directly into a joint deliver a concentrated dose of anti-inflammatory medication to the exact site of pain. This route is common for osteoarthritis, tendinitis, and bursitis. Pain relief typically kicks in within a few days and lasts anywhere from four weeks to three months.
How often you can get joint injections is a topic doctors still debate. There are no firmly established yearly or lifetime limits, but current multi-society guidelines suggest waiting at least two to three weeks between injections in the same joint, with many clinicians preferring a three-month gap. The concern with frequent injections isn’t just diminishing returns. Repeated steroid exposure can gradually weaken cartilage and surrounding tissue over time.
Intramuscular injections are used for both corticosteroids and anabolic steroids like testosterone. For testosterone replacement therapy, the drug is typically injected into the thigh or, with subcutaneous technique, into the fat tissue of the abdomen about 3 to 5 centimeters from the belly button. Subcutaneous injections use shorter, thinner needles (often a 25-gauge, 5/8-inch needle) compared to the larger needles needed for deep muscle injections, making them less painful for many patients.
Intravenous Pulse Therapy
When a disease flares aggressively and needs to be brought under control fast, steroids can be given directly into a vein at very high doses over a short period. This is called pulse therapy. It’s used for severe autoimmune and inflammatory conditions such as lupus, dermatomyositis, certain blistering skin diseases, and systemic vasculitis.
A typical pulse involves high-dose methylprednisolone infused daily for three to five consecutive days, often repeated monthly during an induction phase. Because the medication enters the bloodstream immediately and at full strength, pulse therapy works faster than any other route. It also carries a higher risk of short-term side effects like blood sugar spikes, flushing, rapid heartbeat, and mood changes, so it’s done under close medical supervision, usually in a hospital or infusion center.
Eye and Ear Drops
Steroid eye drops treat inflammation from surgery, allergic reactions, or conditions like uveitis. The technique for applying them affects both how well they work and whether you absorb unnecessary medication systemically. After tilting your head back and pulling down the lower lid to create a small pocket, you squeeze the prescribed number of drops in, then close your eye and press gently on the tear duct (the small indent at the inner corner of your eye near your nose) for at least one minute. This pressure keeps the drops from draining down through the nasal passages into the throat, where they’d be swallowed and absorbed into the bloodstream.
Steroid ear drops work similarly for conditions like outer ear infections or inflammation of the ear canal. The drops are placed directly into the ear canal while the head is tilted to the side, and you stay in that position for a few minutes to let the medication reach the affected tissue.
How Doctors Choose the Route
The guiding principle is to get the steroid as close to the problem as possible while exposing the rest of the body to as little as possible. A skin rash gets a cream. Inflamed airways get an inhaler. A single swollen knee gets a direct injection. Systemic routes like pills or IV therapy are reserved for conditions that affect multiple organs or that haven’t responded to localized treatment. This hierarchy minimizes the well-known side effects of steroids, from thinning skin and bone loss to blood sugar disruption and immune suppression, by keeping circulating drug levels as low as the situation allows.