Monoclonal antibody (immune system modifier)
Last reviewed June 2026
Who is this for?
Satralizumab (sold as Enspryng) is an injectable medicine that works by blocking a protein called interleukin-6, which causes harmful inflammation that damages the nerves in your eyes and spinal cord.
Binds to interleukin-6 (IL-6) receptors on immune cells, blocking IL-6 signaling and suppressing the differentiation and activation of pathogenic B cells and T cells that attack the optic nerve and spinal cord in NMOSD.
Prescription Required
You need a doctor's prescription to buy this drug.
Explore this drug
This is not a tablet — it is an injection given under the skin (subcutaneous). You take it every 2 weeks for the first 3 doses (at week 0, 2, and 4), then once every 4 weeks after that. Your doctor or nurse may teach you how to inject it yourself at home using a pre-filled syringe.
If you miss a dose, take it as soon as you remember and then adjust your next dose schedule from that date. Do not take a double dose. Contact your doctor for guidance on when to take the next one.
This is a specialist prescription medicine — do not buy from unverified sources or roadside sellers; it must be stored in a fridge and handled properly. Always attend your follow-up appointments so your doctor can monitor your liver and check for infections. Do not share this medicine with anyone else, even if they have similar symptoms.
Satralizumab can affect how your liver processes other medicines, so tell your doctor about all drugs you are taking. Live vaccines (like yellow fever vaccine) should be avoided while on this medicine. Let your doctor know if you are using any other medicines that suppress your immune system.
Check your specific combination
Is it safe to take Satralizumab with your other drugs?
Satralizumab is not recommended during pregnancy or breastfeeding unless your doctor decides the benefit clearly outweighs the risk — always consult your doctor before starting or continuing treatment if you are pregnant, planning to become pregnant, or breastfeeding.
Store Enspryng in a refrigerator (2°C to 8°C). Do not freeze it. Keep it in its original carton to protect from light. In Nigeria's hot weather, do not leave it outside the fridge — it can spoil quickly. Keep far away from children.
For information only — not medical advice. Always talk to a doctor or pharmacist before changing your medication.
Names this drug is sold under — especially in Nigerian and West African pharmacies
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Counterfeit Drug Warning
Fake drugs are a serious problem in Nigeria. Always buy from a registered pharmacy. If the packaging looks different from what is described above, do not use it.