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Flucloxacillin Side Effects

Report Flucloxacillin Side Effects

If you experienced any harmful or unwanted effects of Flucloxacillin, please share your experience. This could help to raise awareness about Flucloxacillin side effects, identify uknown risks and inform health professionals and patients taking Flucloxacillin.

Examples: headache, dizziness


The most commonly reported Flucloxacillin side effects are:
Tiredness (238 reports)
Tired (154 reports)
Feeling Sick (133 reports)
Rash (122 reports)
Pain In Asophagis (109 reports)
Pain (104 reports)
Diarrhea (77 reports)
Dry Throat (42 reports)
Black Stools (32 reports)

If you have experienced a side effect listed above, you can check a box to report it.


To view a complete list of submitted side effects, please follow the link Flucloxacillin side effects . You can also compare Flucloxacillin side effects or view FDA reports.

Flucloxacillin Side Effects reported to FDA

The following Flucloxacillin reports list potential signals of serious risks and new safety information that were identified using the FDA Adverse Event Reporting System (FAERS).
The FAERS is a database that contains information on adverse event and medication errors reports submitted to FDA by healthcare professionals (such as physicians, pharmacists, nurses and others), consumers (such as patients, family members, layers and others) and manufacturers.


The appearance of Flucloxacillin on this list does not mean that FDA has concluded that the drug has the listed risk. It means that FDA has identified a potential safety issue, but it does not mean that FDA has identified a causal relationship between the drug and the listed risk.

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Dry Mouth, Diabetes Mellitus, Weight Decreased, Fatigue, Polydipsia, Polyuria
on Mar 13, 2012 Male from UNITED KINGDOM , 46 years of age, was diagnosed with and was treated with Flucloxacillin. Directly after, patient experienced the unwanted or unexpected Flucloxacillin side effects: dry mouth, diabetes mellitus, weight decreased, fatigue, polydipsia, polyuria. Flucloxacillin dosage: Unk.
Associated medications used: Patient was hospitalized and became disabled.

Metabolic Acidosis
Patient was taking Flucloxacillin. Patient felt the following Flucloxacillin side effects: metabolic acidosis on Feb 23, 2012 from IRELAND Additional patient health information: Female , 83 years of age, was diagnosed with and. Flucloxacillin dosage: N/A.
Multiple prescriptions taken:
  • Irbesartan
  • Acetaminophen
  • Metformin Hcl
  • Acetaminophen
Patient was hospitalized.

Jaundice, Hepatotoxicity
Adverse event was reported on Feb 06, 2012 by a Male taking Flucloxacillin (Dosage: 2g, 4/1 Days) . Location: UNITED KINGDOM , 87 years of age, weighting 176.4 lb, After Flucloxacillin was administered, patient encountered several Flucloxacillin side effects: jaundice, hepatotoxicity. Patient was hospitalized.

Dyspnoea, Arteriospasm Coronary, Acute Coronary Syndrome, Ventricular Hypokinesia, Stress Cardiomyopathy, Chest Discomfort
on Jan 09, 2012 Female from SWEDEN , 37 years of age, was diagnosed with
  • mastitis
  • lactation puerperal increased
  • breast engorgement
and was treated with Flucloxacillin. Directly after, patient experienced the unwanted or unexpected Flucloxacillin side effects: dyspnoea, arteriospasm coronary, acute coronary syndrome, ventricular hypokinesia, stress cardiomyopathy, chest discomfort. Flucloxacillin dosage: N/A.
Associated medications used: Patient was hospitalized.


Agranulocytosis
on Jan 03, 2012 Female from NETHERLANDS , 51 years of age, was diagnosed with and was treated with Flucloxacillin. Patient felt the following Flucloxacillin side effects: agranulocytosis. Flucloxacillin dosage: 500 Mg, Unk.
Multiple prescriptions taken: Patient was hospitalized.

Palpitations, Withdrawal Syndrome, Chest Pain, Blood Pressure Abnormal
Patient was taking Flucloxacillin. After Flucloxacillin was administered, patient encountered several Flucloxacillin side effects: palpitations, withdrawal syndrome, chest pain, blood pressure abnormal on Oct 03, 2011 from UNITED KINGDOM Additional patient health information: Male , 41 years of age, was diagnosed with and. Flucloxacillin dosage: 500 Mg, 4x/day.
Multiple concurrent drugs taken: Patient was hospitalized.

Withdrawal Syndrome, Pain, Palpitations
Adverse event was reported on Aug 12, 2011 by a Male taking Flucloxacillin (Dosage: 500 Mg, 4x/day) was diagnosed with and. Location: UNITED KINGDOM , 41 years of age, Directly after, patient experienced the unwanted or unexpected Flucloxacillin side effects: withdrawal syndrome, pain, palpitations.
Associated medications used: Patient was hospitalized.

Blister, Rash Macular
on Jun 28, 2011 Male from UNITED KINGDOM , 58 years of age, weighting 187.4 lb, was treated with Flucloxacillin. Patient felt the following Flucloxacillin side effects: blister, rash macular. Flucloxacillin dosage: Unk.
Multiple prescriptions taken:
  • Epaderm (Unk)
  • Ramipril (Unk)
  • Amlodipine Besylate (Unk)
  • Propranolol (Unk)
  • Fexofenadine (Unk)


Depressed Level Of Consciousness, Tachycardia, Sepsis, Metabolic Acidosis, Hypotension, Tachypnoea
on Apr 15, 2011 Female from UNITED KINGDOM , 50 years of age, was treated with Flucloxacillin. After Flucloxacillin was administered, patient encountered several Flucloxacillin side effects: depressed level of consciousness, tachycardia, sepsis, metabolic acidosis, hypotension, tachypnoea. Flucloxacillin dosage: 8 G, Unk.
Multiple concurrent drugs taken:
  • Paracetamol (4g, Daily)
  • Carbamazepine
  • Phenobarbital
  • Phenytoin
Patient was hospitalized.

Renal Failure Acute, Rhabdomyolysis
Patient was taking Flucloxacillin And Fusidic Acid/sodium Fusidate. Directly after, patient experienced the unwanted or unexpected Flucloxacillin side effects: renal failure acute, rhabdomyolysis on Mar 29, 2011 from UNITED KINGDOM Additional patient health information: Male , 81 years of age, . Flucloxacillin And Fusidic Acid/sodium Fusidate dosage: N/A.
Associated medications used:

Toxicity To Various Agents, Rhabdomyolysis, Renal Failure Acute
Adverse event was reported on Mar 25, 2011 by a Male taking Flucloxacillin (Dosage: N/A) . Location: UNITED KINGDOM , 81 years of age, Patient felt the following Flucloxacillin side effects: toxicity to various agents, rhabdomyolysis, renal failure acute.
Multiple prescriptions taken: Patient was hospitalized.

Abasia, Rhabdomyolysis, Toxicity To Various Agents, Renal Failure Acute
on Mar 23, 2011 Male from , 81 years of age, was treated with Flucloxacillin. After Flucloxacillin was administered, patient encountered several Flucloxacillin side effects: abasia, rhabdomyolysis, toxicity to various agents, renal failure acute. Flucloxacillin dosage: N/A.
Multiple concurrent drugs taken:

Pallor, Erythema, Swelling, Swollen Tongue, Lip Swelling, Swelling Face, Urticaria
on Mar 28, 2011 Female from UNITED KINGDOM , 32 years of age, weighting 126.8 lb, was treated with Flucloxacillin. Directly after, patient experienced the unwanted or unexpected Flucloxacillin side effects: pallor, erythema, swelling, swollen tongue, lip swelling, swelling face, urticaria. Flucloxacillin dosage: 1 G, 2x/day.
Associated medications used:
  • Ibuprofen (400 Mg, As Needed)
  • Terbutaline (Unk)
  • Cefoxitin (2.4 Mg, 2x/day)
  • Imipenem (500 Mg, 4x/day)
  • Deoxyribonuclease Human (2.5 Mg, 1x/day)
  • Colomycin (2 Mg, 2x/day)
  • Tigecycline (50 Mg, 2x/day)
  • Amikacin (450 Mg, 2x/day)
Patient was hospitalized.

Sensory Loss, Neuropathy Peripheral
Patient was taking Flucloxacillin. Patient felt the following Flucloxacillin side effects: sensory loss, neuropathy peripheral on Mar 15, 2011 from UNITED KINGDOM Additional patient health information: Female , 81 years of age, weighting 158.7 lb, was diagnosed with and. Flucloxacillin dosage: 500 Mg, Unk.
Multiple prescriptions taken:
  • Lansoprazole
  • Metronidazole (400 Mg, Unk)
  • Acetylsalicylic Acid (75 Mg, 1x/day)
  • Bendrofluazide
  • Iron


Cerebral Ventricle Dilatation, Headache, Cerebral Ischaemia, Benign Intracranial Hypertension
Adverse event was reported on Mar 07, 2011 by a Male taking Flucloxacillin (Dosage: 1 Df, 4x/day) . Location: UNITED KINGDOM , 55 years of age, weighting 220.5 lb, After Flucloxacillin was administered, patient encountered several Flucloxacillin side effects: cerebral ventricle dilatation, headache, cerebral ischaemia, benign intracranial hypertension.
Multiple concurrent drugs taken:
  • Champix (1 Mg, 2x/day)
  • Clobetasone (Unk)
  • Balneum (Unk)


Pain, Nasopharyngitis, Neutropenia, Cough
on Mar 04, 2011 Male from UNITED KINGDOM , 78 years of age, weighting 145.5 lb, was treated with Flucloxacillin. Directly after, patient experienced the unwanted or unexpected Flucloxacillin side effects: pain, nasopharyngitis, neutropenia, cough. Flucloxacillin dosage: N/A.
Associated medications used:
  • Metformin
  • Nitrofurantoin (Unk)
  • Gentamicin (320 Mg, 1x/day)
  • Ciprofloxacin (Unk)
  • Gliclazide
  • Trimethoprim (Unk)
  • Ferrous Fumarate
  • Lisinopril
Patient was hospitalized.

Coagulation Time Shortened, Embolic Stroke
on Aug 31, 2010 Female from IRELAND , 68 years of age, was diagnosed with and was treated with Flucloxacillin. Patient felt the following Flucloxacillin side effects: coagulation time shortened, embolic stroke. Flucloxacillin dosage: N/A.
Multiple prescriptions taken:
  • Warfarin Sodium (Doses Of 4 And 3mg On Alternate Days)
  • Quinapril
  • Atorvastatin Calcium
  • Metoprolol Tartrate
  • Lercanidipine
  • Spironolactone
  • Bumetanide
  • Digoxin
Patient was hospitalized.

Hemiparesis, Ischaemic Stroke
Patient was taking Flucloxacillin (ngx). After Flucloxacillin was administered, patient encountered several Flucloxacillin side effects: hemiparesis, ischaemic stroke on Aug 26, 2010 from IRELAND Additional patient health information: Female , 68 years of age, was diagnosed with and. Flucloxacillin (ngx) dosage: 500 Mg, Qid.
Multiple concurrent drugs taken:
  • Warfarin Sodium (4 And 3mg On Alternate Days)
  • Phenoxymethylpenicillin (999 Mg, Qid)
  • Quinapril
  • Atorvastatin
  • Metoprolol Tartrate
  • Calcium Channel Blockers
  • Spironolactone
  • Bumetanide


Distal Intestinal Obstruction Syndrome
Adverse event was reported on Nov 05, 2009 by a Female taking Flucloxacillin (Dosage: Daily Dose: 2000 Milligram(s)) was diagnosed with and. Location: UNITED KINGDOM , 13 years of age, Directly after, patient experienced the unwanted or unexpected Flucloxacillin side effects: distal intestinal obstruction syndrome.
Associated medications used:
  • Creon
  • Vitamin K Tab (Daily Dose: 10 Milligram(s))
  • Vitamin E (Daily Dose: 75 International Unit(s))
  • Ketovite Tablets (Daily Dose: 3 Dosage Form)
  • Vitamin A+d (Daily Dose: 2 Dosage Form)
  • Urso 250 (Daily Dose: 600 Milligram(s))
Patient was hospitalized.

Distal Intestinal Obstruction Syndrome
on Nov 05, 2009 Female from UNITED KINGDOM , 13 years of age, was diagnosed with and was treated with Flucloxacillin. Patient felt the following Flucloxacillin side effects: distal intestinal obstruction syndrome. Flucloxacillin dosage: Daily Dose: 1000 Milligram(s).
Multiple prescriptions taken:
  • Creon
  • Vitamin K Tab (Daily Dose: 10 Milligram(s))
  • Vitamin E (Daily Dose: 75 International Unit(s))
  • Ketovite Liqiud (Daily Dose: 5 Millilitre(s))
  • Ketovite Tablets (Daily Dose: 3 Dosage Form)
  • Omeprazole (Daily Dose: 20 Milligram(s))
  • Salbutamol Mdi
  • Urso 250 (Daily Dose: 750 Milligram(s))
Patient was hospitalized.

Distal Intestinal Obstruction Syndrome
on Nov 05, 2009 Female from UNITED KINGDOM , child 4 years of age, was diagnosed with and was treated with Flucloxacillin. After Flucloxacillin was administered, patient encountered several Flucloxacillin side effects: distal intestinal obstruction syndrome. Flucloxacillin dosage: Daily Dose: 750 Milligram(s).
Multiple concurrent drugs taken: Patient was hospitalized.

Distal Intestinal Obstruction Syndrome
Patient was taking Flucloxacillin. Directly after, patient experienced the unwanted or unexpected Flucloxacillin side effects: distal intestinal obstruction syndrome on Nov 05, 2009 from UNITED KINGDOM Additional patient health information: Female , child 11 years of age, was diagnosed with and. Flucloxacillin dosage: Daily Dose: 1500 Milligram(s).
Associated medications used:
  • Creon
  • Menadiol Sod Diphos (Daily Dose: 10 Milligram(s))
  • Vitamin E (Daily Dose: 75 International Unit(s))
  • Ketovite Tablets (Daily Dose: 3 Dosage Form)
  • Ketovite Liquid (Daily Dose: 5 Millilitre(s))
  • Salbutamol Inhaler (Daily Dose: 2 Dosage Form)
  • Salmeterol + 250 Fluticasone Inhaler (Daily Dose: 4 Dosage Form)
Patient was hospitalized.

International Normalised Ratio Decreased
Adverse event was reported on Oct 26, 2009 by a Male taking Flucloxacillin (Dosage: N/A) . Location: NEW ZEALAND , 58 years of age, Patient felt the following Flucloxacillin side effects: international normalised ratio decreased.
Multiple prescriptions taken:

Coagulation Time Prolonged, Confusional State, Haematuria, Melaena
on Feb 05, 2009 Male from UNITED KINGDOM , 37 years of age, was diagnosed with and was treated with Flucloxacillin. After Flucloxacillin was administered, patient encountered several Flucloxacillin side effects: coagulation time prolonged, confusional state, haematuria, melaena. Flucloxacillin dosage: Unk.
Multiple concurrent drugs taken:

Blood Creatine Phosphokinase Increased, Rhabdomyolysis
on Sep 25, 2007 Male from UNITED KINGDOM , 45 years of age, was treated with Flucloxacillin. Directly after, patient experienced the unwanted or unexpected Flucloxacillin side effects: blood creatine phosphokinase increased, rhabdomyolysis. Flucloxacillin dosage: N/A.
Associated medications used: Patient was hospitalized.

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Most drugs have a large list of nonsevere or mild adverse effects which do not rule out continued usage. These effects depend on individual sensitivity, and can include nausea, dizziness, diarrhea, malaise, vomiting, headache, dermatitis, dry mouth, etc. Check commonly reported side effects . These can be considered a form of pseudo-allergic reaction, as not all users experience these effects; many users experience none at all.

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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