Drug Identity
Active Ingredient
Isoniazid
Chemical Class
Hydrazine
Pharmacological Group
on the basis of mechanism of action and also cl...
ATC Code
J04AC01
Status
Essential Medicine
What is ATD+?
Uses
Isoniazid is an antibiotic that fights bacteria. Isoniazid is used to treat and to prevent tuberculosis (TB). You may need to take other ...
How It Works
Chemical Class
Hydrazine
Pharmacological Group
on the basis of mechanism of action and also classified in Antitubercular Drug pharmacological group
Isoniazid also known as Isonicotinic Acid Hydrazide, It is of Synthetic origin and belongs to Hydrazine. It belongs to Antimycobacterial agent pharmacological group on the basis of mechanism of action and also classified in Antitubercular Drug pharmacological group. The Molecular Weight of Isoniazid is 137.14. Its pKa is 1.8, 3.5, 9.5.
How to Take It
1
Adult · PO
300 mg — 24 hourly
Give 30 min. before breakfast for 2 months.
2
Adult
Scraped Dose
Follow all directions on your prescription label. Do not take isoniazid in larger or smaller amounts or for longer than recommended. Take isoniazid on an empty stomach, at least 1 hour before or 2
3
Child · Intra Muscular
15 mg/kg — 24 hourly
Single Dose
4
Child · Intra Venous
10 mg/kg — 24 hourly
Single Dose
5
Child · Oral
10 mg/kg — 24 hourly
Single Dose
Safety Alerts
You should not use isoniazid if you are allergic to it, or if you have: active liver disease
a history of severe allergic reaction to isoniazid
a history of hepatitis or other liver problems caused by taking isoniazid
or a history of severe isoniazid side effects such as fever, chills, or joint pain and swelling
To make sure isoniazid is safe for you, tell your doctor if you have: a history of liver disease
Important Warnings
You should not use isoniazid if you have active liver disease , or if you have taken isoniazid in the past and it caused liver problems, fever, chills, joint pain , or severe allergic reaction
Serious and sometimes fatal liver problems may occur during treatment with isoniazid or after you stop taking this medicine, especially if you are between the ages of 35 and 65
Your liver function may need to be checked every month while you are taking this medicine
Call your doctor right away if you have: nausea, upper stomach pain, loss of appetite, and feeling weak or tired
Avoid drinking alcohol
It may increase your risk of liver damage while you are taking isoniazid
Side Effects
Get emergency medical help if you have signs of an allergic reaction (hivesdifficult breathingswelling in your face or throat) or a severe skin reaction (feversore throatburning in your eyesskin painred or purple skin rash that spreads and causes blistering and peeling). Seek medical treatment if you have a serious drug reaction that can affect many parts of your body. Symptoms may include: skin rashfeverswollen glandsflu-like symptomsmuscle achessevere weaknessunusual bruisingor yellowing of your skin or eyes. This reaction may occur several weeks after you began using isoniazid. Isoniazid may cause serious side effects. Call your doctor at once if you have: sudden weakness or ill feelingor fever for 3 days or longer
Drug Interactions
Many drugs can interact with isoniazid. This includes prescription and over-the-counter medicines
vitamins
and herbal products . Not all possible interactions are listed in this medication guide. Tell your doctor about all medicines you use
and those you start or stop using during your treatment with isoniazid. Give a list of all your medicines to any healthcare provider who treats you.
Storage
Oral Syrup, Inj Store at room temperature. Do not Freeze. Protect from Sunlight. Tab Store in a well closed container, Between 15°C-30°C. Protect from Sunlight and Moisture.
Price Intelligence
Rs 653.32
DRAP approved maximum price · per pack of 100 · approved 27 Jul, 2026
No retail price observed for this pack. Retailers may not exceed the approved maximum.
Prices across sources
DRAPper pack of 100Rs 653.32
Should you consider an alternative?
Other options containing Isoniazid, and what they are not.
These contain this ingredient plus others. They are different medicines — do not swap.
Experaforte
75mg
Rs 1,266.06
No DRAP alertsLucky Core Industries Limited
Experapforte
75mg
Rs 4,081.2
No DRAP alertsLucky Core Industries Limited
Expera Forte
150mg
Rs 4,081.2 ceiling
No DRAP alertsLucky Core Industries Limited
Isoniazid
100mg
Rs 317.4 ceiling
UNEXO LABS (PVT) LTD.
Ramid
150mg
Rs 3,235.29 ceiling
No DRAP alertsARP (PVT) Limited
RIN
150mg
Rs 4,404.46 ceiling
Lucky Core Industries Limited
Rimstar film Coated
150mg
Rs 3,395.11 ceiling
Global Pharmaceuticals Pvt Ltd
Unerif
150mg
+ Rifampicin 300Mg
Rs 3.71
No DRAP alertsUNEXO LABS (PVT) LTD.
Ordered by lowest price per unit where a pack size is known, then by price. Order is never affected by sponsorship. Not medical advice — confirm any change with your pharmacist or doctor.
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