Source: https://hanapmed.ph/generics/isoniazid/

# isoniazid

Sold as [Isonix](https://hanapmed.ph/brandeds/isonix-isoniazid/index.md).

Also in 4 combinations: [ethambutol + isoniazid + pyrazinamide + rifampicin](https://hanapmed.ph/generics/ethambutol-isoniazid-pyrazinamide-rifampicin/index.md) (12 pharmacies), [ethambutol + isoniazid + rifampicin](https://hanapmed.ph/generics/ethambutol-isoniazid-rifampicin/index.md) (8 pharmacies), [isoniazid + pyridoxine](https://hanapmed.ph/generics/isoniazid-pyridoxine/index.md) (7 pharmacies), [isoniazid + rifampicin](https://hanapmed.ph/generics/isoniazid-rifampicin/index.md) (10 pharmacies).

Across 6 pharmacies we found 6 prices for isoniazid in 2 strengths and forms. The [300 mg tablet](#300-mg-tablet), the most widely listed, costs ₱1.22 to ₱5.75; the lowest is isoniazid at Philippine Generic Medicines.

Prices seen Oct 14, 2026

## Strengths

-   [300 mg tablet](#300-mg-tablet)
-   [400 mg tablet](#400-mg-tablet)

-   [In combinations (4)](#combinations)

Strength 300 mg tablet

-   [300 mg tablet 4 pharmacies](#300-mg-tablet)
-   [400 mg tablet 2 pharmacies](#400-mg-tablet)

## Lowest price by strength and form

| Product | Lowest price | Where | Pharmacies |
| --- | --- | --- | --- |
| [300 mg tablet](#300-mg-tablet) | ₱1.22 / tablet | isoniazid at Philippine Generic Medicines | 4 |
| [400 mg tablet](#400-mg-tablet) | ₱2.10 / tablet | Isonix at Philippine Generic Medicines | 2 |

Each table is in the page's order: pharmacies by their lowest price in stock, and each pharmacy's other listings after its lowest. A price reported to DOH has no product page: Mercury Drug's name links to its online order form, and Generika's online store is closed for maintenance, so it has no link.

## 300 mg tablet

| Pharmacy | Brand | Price per unit | Seen |
| --- | --- | --- | --- |
| Philippine Generic Medicines | isoniazid | [**₱1.22 / tablet (₱122 for 100)**, lowest listed](https://philgenericmed.com/product/isoniazid-300mg-tablet/) | Oct 14, 2026 |
| Gebix Pharmacy | isoniazid | [₱1.74 / tablet (₱174 for 100)](https://gebixpharmacy.com/product/isoniazid-300mg-tablet-dm-anti-tb-medication-100s-gebix-pharmacy/) | Oct 14, 2026 |
| The Generics Pharmacy | TGP isoniazid | [₱2.00 / tablet](https://tgp.com.ph/product/rx-tgp-isoniazid-tab-300mg/) | Oct 14, 2026 |
| eHealthPlus | isoniazid | [₱5.75 / tablet](https://ehealthplusph.com/product/isoniazid-300mg-tablet/) | Oct 14, 2026 |
| K2 Pharmacy | isoniazid | [₱5.00 / tablet (₱50 for 10), out of stock online](https://k2pharmacy.ph/products/isoniazid-300mg-tablet?variant=42227297648796); also [₱500 for 100](https://k2pharmacy.ph/products/isoniazid-300mg-tablet?variant=42227297616028) | Oct 14, 2026 |

## 400 mg tablet

| Pharmacy | Brand | Price per unit | Seen |
| --- | --- | --- | --- |
| Philippine Generic Medicines | Isonix | [**₱2.10 / tablet (₱210 for 100)**, lowest listed](https://philgenericmed.com/product/isoniazid-400mg-tablet-isonix/) | Oct 14, 2026 |
| MedsGo | Isonix | [₱3.95 / tablet](https://medsgo.ph/prescription-medicines/respiratory/isonix-isoniazid-400mg-tablet-1s/) | Oct 14, 2026 |
| eHealthPlus | Isonix | [₱3.75 / tablet, out of stock online](https://ehealthplusph.com/product/isonix-isoniazid-400mg-tablet/) | Oct 14, 2026 |

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Price information only, not medical advice: talk to a doctor or pharmacist before switching brands or starting, stopping, or changing any medicine. Prices change; confirm with the pharmacy before buying. [How we compare prices](https://hanapmed.ph/about/index.md). A wrong price: hello@hanapmed.ph.