Medicines and prescriptions
What Is an Oral Suspension? Why You Must Shake It
Oral suspension · say it: OR-ul suh-SPEN-shunAlso written: suspension, liquid suspension, powder for oral suspension
Short answer
An oral suspension is a liquid medicine in which tiny particles of the drug are spread through the liquid, so it must be shaken before each dose.
What it means
An oral suspension is a liquid medicine to swallow. Unlike a solution, where the drug is fully dissolved, the drug in a suspension is made of tiny solid particles that float in the liquid and settle over time. Suspensions are common for children's antibiotics and for people who cannot swallow tablets.
The label usually says 'shake well before use', because if the bottle is not shaken the particles stay at the bottom and doses can be too weak at first and too strong later. Some come as a powder that the pharmacist mixes with water; once mixed they may need to go in the fridge and be thrown away after a set number of days, as printed on the label.
Doses should be measured with the oral syringe or cup provided, not a kitchen spoon, because kitchen spoons vary in size.
Where you may see it
- Children's antibiotic and fever medicine bottles
- Pharmacy labels: 'Shake well. Keep in the refrigerator. Discard after...'
- Prescription lines in clinic notes
📄 How it looks on a report
Amoxicillin oral suspension. Shake well before use. Discard remaining after 14 days.
🙅 What it does not mean
- It is not the same as a syrup or solution, which do not need shaking in the same way.
- A kitchen teaspoon is not an accurate way to measure it.
- Having medicine left over does not mean you should keep it for next time.
🗒️ Questions to ask your doctor
🧾 Reports where you will see “Oral suspension”
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💊 Medicines whose labels mention “Oral suspension”
Plain-English explanations of each medicine, from its official FDA label.
- Amoxicillin
a penicillin-class antibacterial medicine that works against bacteria
- Amoxicillin and Clavulanate Potassium
A penicillin-class antibacterial combined with a beta-lactamase inhibitor, as the label describes it
- Carbamazepine
a mood stabilizer, and an anticonvulsant (seizure) medicine, according to the label
- Dolutegravir
an HIV-1 integrase strand transfer inhibitor (INSTI), a type of HIV medicine
- Oseltamivir
An influenza neuraminidase inhibitor, a type of antiviral medicine used against the flu
- Valacyclovir
an antiviral medicine. The label describes it as a deoxynucleoside analogue DNA polymerase inhibitor, and it is the hydrochloride salt of the L-valyl ester of acyclovir.
- Valsartan
An angiotensin II receptor blocker (ARB), a type of medicine used to treat high blood pressure and certain heart conditions
🔗 Read more from trusted sources
- “Oral suspension” on MedlinePlus ↗
US National Library of Medicine
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