Olsalazine (Na)
Also known as: Azodisal Na
Olsalazine (Na) is a sulfa free drug based on 5-aminosalicyclic acid. It consist of 5-aminosalicylic acid joined together through an azo bond. It acts locally in the colon by delivery of two 5-ASA molecules after splitting of the azo-bond to relieve the inflammation. Olsalazine (Na) is used to treat and prevent relapse of ulcerative colitis. Olsalazine (Na) is prepared by chemical syhthesis. Olsalazine (Na) is administered orally.
Primary Characteristics
Olsalazine (Na) is also known as Azodisal Na.
It is of Synthetic origin and belongs to Aminosalicylic Acid.
It belongs to Ulcerative Colitis remedies (GI) pharmacological group on the basis of mechanism of action and also classified in Antipeptic Ulcerant pharmacological group. It is also classified under Analgesics and Anti-inflammatory Agents .
Molecular Weight: 346.2 · pKa: 2.07, 11.5 · Solubility in Water: Sparingly soluble · Solubility in Alcohol: 1 in 10000 · Non-proprietary name: Olsalazine (Na).

Pharmacokinetics
Absorption: Olsalazine (Na) has an oral bioavailability is 2% (±1%).
Distribution: Olsalazine (Na) has a volume of distribution is 6 litre. plasma protein binding is 99.8 %.
Elimination: it is metabolised via Hepatic, plasma half-life is 56 min, renal excretion is 20 %.
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Indications
Olsalazine (Na) is primarily indicated in conditions like Ulcerative colitis.
Contraindications
Olsalazine (Na) is contraindicated in conditions like Hypersensitivity.
Dosage
Olsalazine (Na)'s dosage details are as follows:
| Dose | Single Dose | Frequency | Route | Instructions |
|---|---|---|---|---|
| Adult Dosage | ||||
| 1 – 3 g | — | — | PO | Initial Dose |
| 0 – 42.857 kg | — | Every 24h | PO | |
| 500 mg | 500 mg | Every 12h | PO | Maintanance dose |
| Paediatric Dosage (20kg) | ||||
| 225 mg/kg | 225 mg/kg | Every 24h | Oral | For above 2 Yrs of children |
| Neonatal Dosage (3kg) | ||||
| 0 – 0 | — | — | Not recommended in this age group | |
Drug Interactions
Always consult your physician for the change of dose regimen or an alternative drug of choice that may strictly be required.
Side Effects
Olsalazine (Na) in overdosage may give rise to further complications which include Pancreatitis .
Olsalazine (Na) produces potentially life-threatening effects which include Bone marrow suppression, Lupus like Syndrome. Careful monitoring is needed with proper medical management.
Olsalazine (Na) is known to cause more or less tolerable side effects which are usually transient. These include Abdominal pain, Alopecia, Arthralgia, Diarrhoea, dizziness, Headache, Light headedness, Loose stools, Nausea, Rashes .
Warnings / Precautions
Available Brands
None recorded.
Storage Conditions
Drug Classification
- 1.17.4 — Anti-inflammtory drugs