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Get Theophylline ER for as low as $34.41, which is 74% off the average retail price of $133.23 for the most common version, by using a GoodRx coupon.
| Dosage | Quantity | Retail price | GoodRx price |
|---|
| 100mg | 30 tablets | $121.83 | $34.41 |
| 200mg | 60 tablets | $341.31 | $36.81 |
| 300mg | 60 tablets | $192.83 | $34.05 |
| 400mg | 30 tablets | $54.54 | $11.35 |
| 450mg | 60 tablets | $288.72 | $43.29 |
| 600mg | 30 tablets | $101.46 | $26.99 |
Popular offers
Get an extra $8.37 off Theophylline ER and up to 90% off all prescriptions. Gold plans start at just $9.99/mo. Cancel any time.*
GoodRx coupon prices last updated on 04/21/26.
