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Get Theophylline ER for as low as $20.62, which is 79% off the average retail price of $98.66 for the most common version, by using a GoodRx coupon.
| Dosage | Quantity | Retail price | GoodRx price |
|---|---|---|---|
| 100mg | 60 tablets | $232.39 | $61.31 |
| 200mg | 60 tablets | $341.88 | $36.81 |
| 300mg | 60 tablets | $192.84 | $34.05 |
| 400mg | 90 tablets | $151.76 | $25.94 |
| 450mg | 60 tablets | $291.10 | $43.29 |
| 600mg | 30 tablets | $102.00 | $26.99 |
Popular offers
Get an extra $9.00 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 04/30/26.
*Prices subject to change without notice. Sales tax may apply and is not included.
