The average cost for 90 capsules of 100mg of Phenytoin is $22.31 with a free GoodRx coupon. This is 54.07% off the average retail price of $48.57.
CapsuleDosage | Quantity | Price as low as | Price per unit |
|---|---|---|---|
200mg | 180 capsules | $70.44 | $0.39 |
100mg | 90 capsules | $22.31 | $0.25 |
300mg | 90 capsules | $57.01 | $0.63 |
Ml of oral suspensionDosage | Quantity | Price as low as | Price per unit |
|---|---|---|---|
125mg/5ml | 1185 ml | $45.10 | $0.04 |
Chewable tabletDosage | Quantity | Price as low as | Price per unit |
|---|---|---|---|
50mg | 90 chewable tablets | $23.12 | $0.26 |
Typical dosage for Phenytoin
Phenytoin is available as a capsule, chewable tablet, and liquid suspension. Phenytek brand is available in 200 mg and 300 mg extended-release capsules. Your prescriber will adjust the dose based on you or your child's blood levels of this medication.
Capsule: Extended-release (ER)
- Adults: The typical starting dose is 100 mg by mouth three times a day, with a maximum of 200 mg three times a day if needed. Once seizures are controlled, some people might be able to take 300 mg extended-release capsule once a day.
- Children: The dose depends on your child’s weight. The starting dose is 5 mg/kg by mouth per day, split into 2 or 3 doses. The maximum dose is 300 mg per day, in divided doses. The typical long-term dose is 4 mg/kg to 8 mg/kg per day. Chewable tablet: Immediate-release (IR)
- Adults: The typical starting dose is 100 mg by mouth three times a day. The maximum dose is 600 mg per day, in divided doses.
- Children: The dose depends on your child’s weight. The starting dose is 5 mg/kg by mouth per day, split into 2 or 3 doses. The maximum dose is 300 mg per day, in divided doses. The typical long-term dose is 4 mg/kg to 8 mg/kg per day.
Liquid suspension: Immediate-release (IR)
- Adults: The typical starting dose is 125 mg (5 ml) by mouth three times a day. The maximum dose is 625 mg per day, in divided doses.
- Children: The dose depends on your child’s weight. The starting dose is 5 mg/kg by mouth per day, split into 2 or 3 doses. The maximum dose is 300 mg per day, in divided doses. The typical long-term dose is 4 mg/kg to 8 mg/kg per day.
Phenytoin is also available as an intravenous (IV) injection that's typically given in hospital setting.
