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Phenobarbital Consumer (continued)
Some products that may interact with this drug include: darunavir, etravirine, felbamate, rilpivirine, MAO inhibitors (isocarboxazid, linezolid, methylene blue, moclobemide, phenelzine, procarbazine, rasagiline, selegiline, tranylcypromine), phenothiazines (such as chlorpromazine, prochlorperazine).
Other medications can affect the removal of phenobarbital from your body, which may affect how phenobarbital works. Examples include disulfiram, phenytoin, valproic acid, St. John's wort, among others.
This medication can speed up the removal of other medications from your body, which may affect how they work. Examples of affected drugs include cobicistat, cyclosporine, doxycycline, estrogens, griseofulvin, metronidazole, ranolazine, voriconazole, "blood thinners" such as warfarin, corticosteroids such as prednisone, calcium channel blockers such as felodipine/nimodipine, among others.
This medication may decrease the effectiveness of hormonal birth control such as pills, patch, or ring. This could cause pregnancy. Discuss with your doctor or pharmacist if you should use additional reliable birth control methods while using this medication. Also tell your doctor if you have any new spotting or breakthrough bleeding, because these may be signs that your birth control is not working well.
The risk of serious side effects (such as slow/shallow breathing, severe drowsiness/dizziness) may be increased if this medication is taken with other products that may also affect breathing or cause drowsiness. Therefore, tell your doctor or pharmacist if you are taking other products that cause drowsiness including alcohol, antihistamines (such as cetirizine, diphenhydramine), tricyclic antidepressants (such as amitriptyline), drugs for sleep or anxiety (such as alprazolam, diazepam, zolpidem), muscle relaxants, and narcotic pain relievers (such as codeine).
Check the labels on all your medicines (such as allergy or cough-and-cold products) because they may contain ingredients that cause drowsiness. Ask your pharmacist about using those products safely.
Phenobarbital is very similar to primidone. Do not use medications containing primidone while using phenobarbital.
OVERDOSE: If overdose is suspected, contact a poison control center or emergency room immediately. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose may include: severe tiredness/dizziness, inability to wake up, very slow breathing rate.
NOTES: Do not share this medication with others. It is against the law.
Keep all medical appointments so that your doctor can monitor your progress or check for side effects. For long-term use, laboratory and/or medical tests (such as phenobarbital blood levels, blood counts, liver/kidney tests) should be performed periodically to monitor your progress or check for side effects. Consult your doctor for more details.
MISSED DOSE: If you are taking this medication to prevent seizures and miss a dose, take it as soon as you remember unless it is almost time for the next dose. In that case, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up.
STORAGE: Store at room temperature between 68-77 degrees F (20-25 degrees C) away from light and moisture. Do not store in the bathroom. Keep all medicines away from children and pets.
Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company for more details about how to safely discard your product.
MEDICAL ALERT: Your condition can cause complications in a medical emergency. For information about enrolling in MedicAlert, call 1-888-633-4298 (US) or 1-800-668-1507 (Canada).
Information last revised December 2014. Copyright(c) 2014 First Databank, Inc.
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