Isoniazid Prices — US Pharmacy Cost vs Canada — Save Up to 80% in Canada

Our most recent US pharmacy data shows a low of roughly $39.65 for Isoniazid with a standard discount card. That figure moves with dosage and quantity — check the comparison table for the exact combination you need.

Yes — Cost Plus Drugs lists Isoniazid at roughly $0.689 per unit, a published price with no membership card or coupon involved. See the three-price comparison above for how that stacks up against discount-card pharmacies.

We found Canadian pricing for Isoniazid starting near $0.140 per tablet in USD terms. That's before any shipping charge, which the table above breaks out separately.

Drug pricing is set separately in each country through different negotiation, regulatory, and distribution systems, so the same medication can legitimately carry different price tags on either side of the border. In this case, our data shows the Canadian price coming in lower — but that isn't true for every drug, so it's worth checking each medication individually rather than assuming.

Your copay for Isoniazid depends entirely on the details of your specific insurance plan. It's advisable to check your plan's formulary and copay structure with your pharmacist. For some patients, especially those with high deductible plans, the cash price using a pharmacy savings option may be lower than the standard insurance copay. Your pharmacist can help you compare the available prices to get the best value.

Yes, as a generic medication, Isoniazid is generally covered under Medicare Part D and Medicare Advantage prescription drug plans. The specific out-of-pocket cost will depend on the plan's formulary tier, deductible, and copay requirements. Beneficiaries without Medicare drug coverage or those seeking to lower their costs can explore using a prescription discount program, which may offer pricing competitive with or below standard Medicare copays.

Isoniazid is most commonly prescribed as a generic medication, produced by manufacturers like WestWard and Sandoz. A brand-name version, Nydrazid, is also FDA-approved for treating tuberculosis. Both the generic and brand-name forms contain the same active ingredient and are equally effective when prescribed for appropriate indications.