Fioricet Dosing
The dose medicines in this class will be different for different patients. Follow your doctor’s orders or the directions on the label.
The following information includes only the average doses of these medicines. If your dose is different, do not change it unless your doctor tells you to do so.
The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.
- For oral dosage forms (capsules or tablets):
- For tension headaches:
- Adults—One or 2 capsules or tablets every four hours as needed. If your medicine contains 325 or 500 milligrams (mg) of acetaminophen in each capsule or tablet, you should not take more than six capsules or tablets a day. If your medicine contains 650 mg of acetaminophen in each capsule or tablet, you should not take more than four capsules or tablets a day.
- Children—Dose must be determined by your doctor.
- For tension headaches:
Toxic Reactions to Fioricet may be Greater in People who Have Kidney Damage
Butalbital (an ingredient in Fioricet) is heavily removed from the body by the kidney, and the risk of toxic reactions to Fioricet may be greater in people who have kidney damage. Because older adults are more likely to have kidney damage, they should usually start with the lowest possible dose recommended by their doctor. Older adults may also want to have their kidney function monitored while they are taking Fioricet.
This is because Fioricet contains acetaminophen, and the liver and kidneys are responsible for metabolizing and eliminating this drug from the body.
In people with kidney damage or impaired kidney function, the clearance of drugs, including acetaminophen, from the bloodstream may be reduced. As a result, the drug can accumulate in the body to higher levels than in individuals with normal kidney function. This accumulation increases the risk of toxic reactions and adverse effects associated with acetaminophen, which can include liver damage.
The toxic effects of acetaminophen overdose are well-documented and can be severe, including liver failure. Therefore, individuals with kidney damage should exercise caution when using Fioricet or any medication containing acetaminophen. It’s essential for them to work closely with a healthcare provider to determine safe dosages, monitor their kidney function, and consider alternative pain relief options that may be less taxing on the kidneys.
If you have kidney damage or any concerns about the use of Fioricet, consult with a healthcare professional who can provide guidance on safe and appropriate medication choices.
