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Get Theophylline ER for as low as $36.81, which is 89% off the average retail price of $348.71 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 |
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GoodRx coupon prices last updated on 04/22/26.
