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Get Lactulose for as low as $90.36, which is 70% off the average retail price of $302.35 for the most common version, by using a GoodRx coupon.

Popular offers
| Dosage | Quantity | Retail price | GoodRx price |
|---|
| Dosage | Quantity | Retail price | GoodRx price |
|---|
| 10g/ 15ml | 473 ml | N/A | $6.43 |
| 20g/ 30ml | 1200 ml | $25.50 | $21.43 |
| 15 packets of 10g | 1 carton | $1,057.71 | $42.87 |
| 30 packets of 10g | 1 carton | $342.14 | $81.25 |
| 15 packets of 20g | 1 carton | $1,842.50 | $47.43 |
| 30 packets of 20g | 1 carton | $245.95 | $90.36 |
Get an extra $7.00 off Lactulose and up to 90% off all prescriptions. Gold plans start at just $9.99/mo. Cancel any time.*
GoodRx coupon prices last updated on 05/01/26.
*Prices subject to change without notice. Sales tax may apply and is not included.