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Phenobarbital

Phenobarbital Dosage

Robert Chad Hakim, PharmD, BCCCPKristianne Hannemann, PharmD
Reviewed by Robert Chad Hakim, PharmD, BCCCP, Kristianne Hannemann, PharmD
Last reviewed on July 25, 2023

The average cost for 60 tablets of 64.8mg of Phenobarbital is $15.49 with a free GoodRx coupon. This is 65.95% off the average retail price of $45.49.

tabletTablet

Dosage

Quantity

Price as low as

Price per unit

16.2mg

60 tablets

$10.96

$0.18

32.4mg

60 tablets

$14.19

$0.24

64.8mg

60 tablets

$15.49

$0.26

97.2mg

60 tablets

$18.07

$0.30

60mg

60 tablets

$10.24

$0.17

100mg

60 tablets

$12.79

$0.21

15mg

60 tablets

$10.32

$0.17

30mg

60 tablets

$10.96

$0.18

ml of elixirMl of elixir

Dosage

Quantity

Price as low as

Price per unit

20mg/5ml

120 ml

$13.04

$0.11

Typical dosage for Phenobarbital

The dose depends on your age, weight, and condition being treated. In general:

Sedation

  • Adults: The typical dose is 30 mg to 120 mg by mouth per day, split up into 2 or 3 doses throughout the day. If used before a procedure, your provider might give you 100 mg to 200 mg by mouth once.

Seizures

  • Adults: The typical dose is 60 mg to 200 mg by mouth per day.
  • Children: The typical dose is 3 mg/kg to 6 mg/kg of body weight by mouth per day.

For seizures, your provider will adjust your dose based on blood levels of the medication. Your dose might differ if you're an older adult or have kidney or liver problems.

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