Terbinafine is an antifungal medication that fights infections caused by fungus.
Terbinafine tablets are used to treat infections caused by fungus that affect the fingernails or toenails.
Terbinafine oral granules are used to treat a fungal infection of scalp hair follicles in children who are at least 4 years old.
Terbinafine may also be used for purposes not listed in this medication guide.
uses
What is Terbinafine (Oral) used for?
- Onychomycosis — Fingernail
- Onychomycosis — Toenail
- Tinea Capitis
- Tinea Corporis
- Tinea Cruris
- Tinea Pedis
warnings
What is the most important information I should know about Terbinafine (Oral)?
You should not use terbinafine if you are allergic to it, or if you have:
- liver disease.
To make sure terbinafine is safe for you, tell your doctor if you have ever had:
- liver problems;
- weak immune system (caused by disease or by using certain medicine); or
- lupus.
It is not known whether this medicine will harm an unborn baby. You should wait until after your pregnancy to start treating your nail or scalp infection with terbinafine. Tell your doctor if you are pregnant or plan to become pregnant during treatment.
Terbinafine can pass into breast milk and may harm a nursing baby. You should not breast-feed while using this medicine.
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Side Effects
What are the side effects of Terbinafine (Oral)?
Get emergency medical help if you have signs of an allergic reaction (hives, difficult breathing, swelling in your face or throat) or a severe skin reaction (fever, sore throat, burning in your eyes, skin pain, red or purple skin rash that spreads and causes blistering and peeling).
Seek medical treatment if you have a serious drug reaction that can affect many parts of your body. Symptoms may include: skin rash, fever, swollen glands, flu-like symptoms, muscle aches, severe weakness, unusual bruising, or yellowing of your skin or eyes. This reaction may occur several weeks after you began using terbinafine.
Some people taking terbinafine have developed severe liver damage leading to liver transplant or death. It is not clear whether terbinafine actually caused the liver damage in these patients. In most cases, the patient had a serious medical condition before taking terbinafine.
Call your doctor at once if you have symptoms of liver damage, such as nausea, upper stomach pain, vomiting, loss of appetite, tiredness, dark urine, clay-colored stools, or jaundice (yellowing of the skin or eyes). These events can occur whether or not you have ever had liver problems before.
Also call your doctor if you have:
- changes in your sense of taste or smell;
- depressed mood, sleep problems, lack of interest in daily activity, feeling anxious or restless;
- pale skin, easy bruising, unusual bleeding (nose, mouth, vagina, or rectum), purple or red pinpoint spots under your skin;
- swelling, rapid weight gain, little or no urinating;
- blood in your urine or stools;
- weight loss due to taste changes or loss of appetite; or
- skin sores, butterfly-shaped skin rash on your cheeks and nose (worsens in sunlight).
Common side effects may include:
- diarrhea, nausea, gas, stomach pain or upset;
- rash;
- headache;
- abnormal liver function tests.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
Pregnancy & Breastfeeding
Can I take Terbinafine (Oral) if I’m pregnant or breastfeeding?
It is not known whether this medicine will harm an unborn baby. You should wait until after your pregnancy to start treating your nail or scalp infection with terbinafine. Tell your doctor if you are pregnant or plan to become pregnant during treatment.
Terbinafine can pass into breast milk and may harm a nursing baby. You should not breast-feed while using this medicine.
Interactions
What drugs and food should I avoid while taking Terbinafine (Oral)?
Avoid coffee, tea, cola, energy drinks or other sources of caffeine while taking this medicine.
Avoid exposure to sunlight or tanning beds. Terbinafine can make you sunburn more easily. Wear protective clothing and use sunscreen (SPF 30 or higher) when you are outdoors.
Dosage Guidelines & Tips
How to take Terbinafine (Oral)?
Use Terbinafine (Oral) exactly as directed on the label, or as prescribed by your doctor. Do not use in larger or smaller amounts or for longer than recommended.
Follow all directions on your prescription label. Do not take this medicine in larger or smaller amounts or for longer than recommended.
You may take the terbinafine tablet with or without food.
Terbinafine granules should be sprinkled into a spoonful of pudding or mashed potatoes (do not mix with applesauce, fruit juice, or other fruit-based or acidic foods). Swallow this mixture right away without chewing. Do not save the mixture for later use.
Terbinafine is usually taken for 6 weeks to treat scalp or fingernail infections, and for 12 weeks to treat a toenail infection.
Use this medicine for the full prescribed length of time. Your symptoms may improve before the infection is completely cleared. Skipping doses may also increase your risk of further infection that is resistant to antifungal medicine. Terbinafine will not treat a viral infection such as the flu or a common cold.
While using terbinafine, you may need frequent blood tests.
It may take several months for your nails to return to their normal appearance after your treatment with terbinafine.
Store at room temperature away from moisture, heat, and light. Keep the terbinafine oral granules in their sealed packet until you are ready to use.
Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.
Overdose Signs
What happens if I overdose on Terbinafine (Oral)?
Overdose symptoms may include headache, dizziness, vomiting, stomach pain, rash, and increased urination.
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