Full price comparison · US & Canada
How Much Does Bethkis Cost? — Save Up to 13% in the US
Cheaper in the US
0%
lower price for Tobramycin, based on the lowest comparable per-unit prices we found
US · discount card
$2,236.56
per fill
Lowest listed pharmacy price
US · Cost Plus Drugs
$2.65
per unit
Published price, no card needed
Canada
$3.04
per tablet
Lowest listed pharmacy price
US pharmacy prices — 4ml of 300mg/4ml
| Pharmacy | Discount-card price | Regular cash price | Average retail |
|---|---|---|---|
 Walgreens | $2,236.56Lowest | $2,239.56 | $51.75 |
 Publix | $3,430.49 | $3,433.49 | $51.75 |
 Kroger Pharmacy | $5,234.05 | $5,237.05 | $51.75 |
 Harris Teeter Pharmacy | $5,234.05 | $5,237.05 | $51.75 |
"Discount-card price" reflects a standard prescription discount card, not insurance. Prices change often — confirm at the pharmacy before filling.
Canadian pharmacy prices
Initial · 3 mg/1 mg/1 g
| Pharmacy | Price / tablet | Pack size | Shipping | Total |
|---|---|---|---|---|
 CanadianPharmacyAdvantage.com | $3.04 | — | Free | $45.63Lowest |
 LifeRxPharmacy.com | $3.38 | — | $14.95 | $50.73 |
 OffShoreCheapMeds.com | $3.43 | — | $14.95 | $51.41 |
| OffShoreCheapMeds.com | $3.62 | — | $14.95 | $36.18 |
| LifeRxPharmacy.com | $3.76 | — | $14.95 | $18.79 |
 CanadaPharmacies.com | $3.80 | — | Free | $56.99 |
| CanadianPharmacyAdvantage.com | $4.86 | — | Free | $24.28 |
 GoldStarMeds.com | $6.07 | — | $0.00 | $30.33 |
 1800RxOnline.com | $6.74 | — | $0.00 | $33.70 |
 InhalersOnline.com | $6.77 | — | $0.00 | $101.55 |
| CanadaPharmacies.com | $7.00 | — | Free | $34.99 |
 SPFPharmacy.com | $7.39 | — | $9.95 | $110.79 |
| InhalersOnline.com | $7.91 | — | $0.00 | $118.71 |
| GoldStarMeds.com | $8.80 | — | $0.00 | $30.80 |
| 1800RxOnline.com | $9.78 | — | $0.00 | $34.22 |
| SPFPharmacy.com | $10.27 | — | $9.95 | $51.35 |
| InhalersOnline.com | $11.62 | — | $0.00 | $58.08 |
| InhalersOnline.com | $11.99 | — | $0.00 | $59.94 |
Canadian prices are converted to USD at the time of listing and shown before any duties. Shipping and delivery times vary by pharmacy.
Interchangeable forms
Per RxNorm (U.S. National Library of Medicine), these share the same active ingredient and strength as Tobramycin.
Frequently asked questions
Is Tobramycin (Bethkis) expensive if I don't have insurance?
At the US pharmacies in our data, the lowest listed discount-card price for Tobramycin is around $2,236.56. Prices vary by pharmacy, dosage, and pack size, so use the table above to compare specific options near you.
Can I buy Tobramycin (Bethkis) at a Cost Plus Drugs price?
Yes — Cost Plus Drugs lists Tobramycin at roughly $2.65 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.
How much does Tobramycin (Bethkis) cost in Canada?
Canadian pharmacy listings in our data show Tobramycin priced from about $3.04 per tablet (converted to USD), before shipping. Pack size and pharmacy both affect the final total — see the Canada pricing table for specifics.
Why does Tobramycin (Bethkis) cost more in one country than the other?
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 US price is actually the lower of the two once a program like Cost Plus Drugs is factored in — the assumption that Canada is always cheaper doesn't hold for every drug.
How does the cost of Bethkis vary for individuals with insurance?
Your out-of-pocket cost for Bethkis with insurance depends entirely on your specific plan's formulary, deductible, and copay structure. It is recommended to ask your pharmacist to check the price under your insurance and compare it to the price available through a prescription savings card or program. In some cases, the savings card price may be lower than your insurance copay.
What is Bethkis and how is it used?
Bethkis is a brand-name inhaled antibiotic containing tobramycin. It is specifically indicated to treat lung infections caused by Pseudomonas aeruginosa in people with cystic fibrosis. This bacterium is particularly problematic for those with compromised lungs. Bethkis works by blocking essential protein synthesis in the bacteria. The standard treatment regimen involves inhaling the medication through a PARI LC PLUS Reusable Nebulizer twice daily for 28 days, followed by a 28-day treatment-free period before resuming the cycle. Always consult your doctor or pharmacist for specific dosing instructions.
What side effects are commonly associated with Bethkis?
The most frequently reported side effects of Bethkis involve the respiratory tract and voice, including hoarseness, sore throat, voice changes, difficulty speaking, wheezing, abnormal lung sounds (rales), and lung problems. Other possible effects include nosebleeds and swollen tonsils. You should seek immediate medical attention if you experience signs of an allergic reaction, such as hives, facial swelling, or difficulty breathing.