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Diflucan Side Effects Center
Medical Editor: Charles Patrick Davis, MD, PhD
Diflucan (fluconazole) is an antifungal medication in the triazole subclass. Diflucan is available as a generic drug termed fluconazole. Diflucan is prescribed to treat Candida fungal infections of the mouth, vagina, esophagus, lungs, urinary tract, abdomen, and other organs. Diflucan is also used to treat fungal meningitis and may be prescribed to ward off fungal infections in patients being treated with chemotherapy or radiation before a bone marrow transplant. Some common side effects of Diflucan include headache, dizziness, drowsiness, abdominal pain, diarrhea, heartburn, loss of appetite, and allergic reactions including skin inflammation, itching, and rash.
Diflucan is available in several strengths and comes as a tablet (50, 100, 150 and 200 mg strength), liquid (350 or 1400 mg strength), or injection (2 mg per ml). Diflucan is taken once a day and may be taken for several weeks depending on the condition being treated. Drug interactions may occur with certain antibiotics, blood thinners, diuretics, sedatives, antiseizure drugs, and other medications. Warnings may apply to individuals who have liver disease. In rare cases, patients treated with Diflucan may develop dangerous heart rhythm abnormalities or serious allergic reactions. Diflucan is not usually recommended for pregnant women or nursing mothers. Diflucan has been used in the pediatric population, but its dose is determined by pediatric patient weight ranges and a mg/Kg sliding scale.
Our Diflucan Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.
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.
What is Patient Information in Detail?
Easy-to-read and understand detailed drug information and pill images for the patient or caregiver from Cerner Multum.
Diflucan in Detail - Patient Information: Side Effects
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have any of these serious side effects:
- nausea, upper stomach pain, itching, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes);
- fever, chills, body aches, flu symptoms;
- severe blistering, peeling, and red skin rash;
- easy bruising or bleeding, unusual weakness; or
- seizure (convulsions).
Less serious side effects may include:
- mild stomach pain, diarrhea, upset stomach;
- dizziness; or
- unusual or unpleasant taste in your mouth.
Read the entire detailed patient monograph for Diflucan (Fluconazole)
What is Patient Information Overview?
A concise overview of the drug for the patient or caregiver from First DataBank.
Diflucan Overview - Patient Information: Side Effects
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Get medical help right away if any of these rare but serious side effects occur: fast/irregular heartbeat, severe dizziness, fainting.
This drug may rarely cause serious liver disease. Get medical help right away if you develop any signs of liver disease, including: severe stomach/abdominal pain, persistent nausea/vomiting, yellowing eyes/skin, dark urine, unusual tiredness.
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
Read the entire patient information overview for Diflucan (Fluconazole)
What is Prescribing information?
The FDA package insert formatted in easy-to-find categories for health professionals and clinicians.
Diflucan FDA Prescribing Information: Side Effects
DIFLUCAN is generally well tolerated.
In some patients, particularly those with serious underlying diseases such as AIDS and cancer, changes in renal and hematological function test results and hepatic abnormalities have been observed during treatment with fluconazole and comparative agents, but the clinical significance and relationship to treatment is uncertain.
In Patients Receiving a Single Dose for Vaginal Candidiasis
During comparative clinical studies conducted in the United States, 448 patients with vaginal candidiasis were treated with DIFLUCAN, 150 mg single dose. The overall incidence of side effects possibly related to DIFLUCAN was 26%. In 422 patients receiving active comparative agents, the incidence was 16%. The most common treatment-related adverse events reported in the patients who received 150 mg single dose fluconazole for vaginitis were headache (13%), nausea (7%), and abdominal pain (6%). Other side effects reported with an incidence equal to or greater than 1% included diarrhea (3%), dyspepsia (1%), dizziness (1%), and taste perversion (1%). Most of the reported side effects were mild to moderate in severity. Rarely, angioedema and anaphylactic reaction have been reported in marketing experience.
In Patients Receiving Multiple Doses for Other Infections
Sixteen percent of over 4000 patients treated with DIFLUCAN (fluconazole) in clinical trials of 7 days or more experienced adverse events. Treatment was discontinued in 1.5% of patients due to adverse clinical events and in 1.3% of patients due to laboratory test abnormalities.
Clinical adverse events were reported more frequently in HIV infected patients (21%) than in non-HIV infected patients (13%); however, the patterns in HIV infected and non-HIV infected patients were similar. The proportions of patients discontinuing therapy due to clinical adverse events were similar in the two groups (1.5%).
The following treatment-related clinical adverse events occurred at an incidence of 1% or greater in 4048 patients receiving DIFLUCAN for 7 or more days in clinical trials: nausea 3.7%, headache 1.9%, skin rash 1.8%, vomiting 1.7%, abdominal pain 1.7%, and diarrhea 1.5%.
In combined clinical trials and marketing experience, there have been rare cases of serious hepatic reactions during treatment with DIFLUCAN. (See WARNINGS.) The spectrum of these hepatic reactions has ranged from mild transient elevations in transaminases to clinical hepatitis, cholestasis and fulminant hepatic failure, including fatalities. Instances of fatal hepatic reactions were noted to occur primarily in patients with serious underlying medical conditions (predominantly AIDS or malignancy) and often while taking multiple concomitant medications. Transient hepatic reactions, including hepatitis and jaundice, have occurred among patients with no other identifiable risk factors. In each of these cases, liver function returned to baseline on discontinuation of DIFLUCAN.
In two comparative trials evaluating the efficacy of DIFLUCAN for the suppression of relapse of cryptococcal meningitis, a statistically significant increase was observed in median AST (SGOT) levels from a baseline value of 30 IU/L to 41 IU/L in one trial and 34 IU/L to 66 IU/L in the other. The overall rate of serum transaminase elevations of more than 8 times the upper limit of normal was approximately 1% in fluconazole-treated patients in clinical trials. These elevations occurred in patients with severe underlying disease, predominantly AIDS or malignancies, most of whom were receiving multiple concomitant medications, including many known to be hepatotoxic. The incidence of abnormally elevated serum transaminases was greater in patients taking DIFLUCAN concomitantly with one or more of the following medications: rifampin, phenytoin, isoniazid, valproic acid, or oral sulfonylurea hypoglycemic agents.
In addition, the following adverse events have occurred during post-marketing experience.
Cardiovascular: QT prolongation, torsade de pointes. (See PRECAUTIONS.)
Central Nervous System: Seizures, dizziness.
Gastrointestinal: Cholestasis, dry mouth, hepatocellular damage, dyspepsia, vomiting.
Other Senses: Taste perversion.
Musculoskeletal System: myalgia.
Skin and Appendages: Acute generalized exanthematous-pustulosis, drug eruption, increased sweating, exfoliative skin disorders including Stevens-Johnson syndrome and toxic epidermal necrolysis (see WARNINGS), alopecia.
Adverse Reactions in Children
The pattern and incidence of adverse events and laboratory abnormalities recorded during pediatric clinical trials are comparable to those seen in adults.
In Phase II/III clinical trials conducted in the United States and in Europe, 577 pediatric patients, ages 1 day to 17 years were treated with DIFLUCAN at doses up to 15 mg/kg/day for up to 1,616 days. Thirteen percent of children experienced treatment-related adverse events. The most commonly reported events were vomiting (5%), abdominal pain (3%), nausea (2%), and diarrhea (2%). Treatment was discontinued in 2.3% of patients due to adverse clinical events and in 1.4% of patients due to laboratory test abnormalities. The majority of treatment-related laboratory abnormalities were elevations of transaminases or alkaline phosphatase.
Percentage of Patients With Treatment-Related Side
|With any side effect||13.0||9.3|
Read the entire FDA prescribing information for Diflucan (Fluconazole)
Additional Diflucan Information
Diflucan - User Reviews
Diflucan User Reviews
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Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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