Medicines and prescriptions
What Does Subcutaneous Mean? Injections Under the Skin
Subcutaneous · say it: sub-kyoo-TAY-nee-usAlso written: SC, SQ, subcut, under the skin, subcutaneous injection
Short answer
Subcutaneous means under the skin. A subcutaneous injection is given into the fatty layer just below the skin.
What it means
Subcutaneous means beneath the skin. A subcutaneous (SC or SQ) injection goes into the layer of fat just under the skin, rather than into a muscle or a vein. Common places are the belly, the front of the thighs and the back of the upper arms. Medicines given this way include insulin, some blood thinners, some vaccines and many newer injectable medicines, often using pens or pre-filled syringes.
Labels for subcutaneous medicines explain where and how to inject, why to rotate injection sites (to avoid lumps or skin changes), and what injection site reactions, such as redness, swelling or itching, can occur. They also tell you which routes not to use, because some medicines are only safe under the skin and not into a muscle or vein.
Subcutaneous is different from intramuscular (into a muscle) and intravenous (into a vein). Each route affects how fast the medicine is absorbed.
Where you may see it
- Instructions for use with injection pens and syringes
- Dosage and administration sections of labels
- Hospital medicine charts ('SC')
📄 How it looks on a report
For subcutaneous use only. Inject into the abdomen, thigh or upper arm. Rotate injection sites.
🙅 What it does not mean
- It does not mean the injection goes into a vein or muscle.
- A little redness at the site is common, but spreading redness, heat or pain should be checked.
- It does not mean you have to inject in exactly the same place each time; rotating is better.
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🗒️ Questions to ask your doctor
🧾 Reports where you will see “Subcutaneous”
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💊 Medicines whose labels mention “Subcutaneous”
Plain-English explanations of each medicine, from its official FDA label.
- Albuterol
A bronchodilator (a medicine that opens the airways) of the beta-2 adrenergic type. The FDA class is not listed, so this description comes from the label's own wording.
- Allopurinol
a xanthine oxidase inhibitor, a prescription medicine that acts on uric acid
- Azithromycin
a macrolide antibacterial (antibiotic) medicine
- Gabapentin
An antiepileptic (seizure) medicine. The label also describes it as a treatment for nerve pain after shingles.
- Glimepiride
a sulfonylurea, a type of oral medicine used to lower blood sugar in adults with type 2 diabetes
- Insulin Glargine
an insulin analog, a long-acting man-made insulin used to treat diabetes
- Ivermectin
An antiparasitic medicine, sometimes called a worm-killing medicine (anthelmintic), that the FDA lists as an antiparasitic and pediculicide
- Lamotrigine
An anti-epileptic (seizure) medicine and mood stabilizer. The label describes it as an anti-epileptic drug of the phenyltriazine class that is chemically unrelated to other anti-epileptic drugs.
- Levetiracetam
An antiepileptic medicine, meaning a medicine used to treat seizures
- Liraglutide
a GLP-1 receptor agonist, a type of medicine that acts like a natural gut hormone called GLP-1 to help lower blood sugar
🔗 Read more from trusted sources
- “Subcutaneous” on MedlinePlus ↗
US National Library of Medicine
- NCI Dictionary definition ↗
US National Cancer Institute: “subcutaneous”
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