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Cephalexin Side Effects

Common Cephalexin Side Effects

The most commonly reported Cephalexin side effects (click to view or check a box to report):

Rash (54)
Pruritus (52)
Diarrhoea (49)
Urticaria (45)
Vomiting (43)
Pain (41)
Dyspnoea (40)
Nausea (40)
Dizziness (34)
Pyrexia (28)
Headache (28)
Deep Vein Thrombosis (26)
Abdominal Pain (26)
International Normalised Ratio Increased (23)
Malaise (22)
Abdominal Pain Upper (22)
Renal Failure Acute (20)
Fatigue (19)
Anaphylactic Reaction (18)
Anxiety (18)

➢ More



If you or someone in your family has experienced a serious side effect to a health product, you are encouraged to report the experience to your health care professional (e.g. physician, pharmacist). You could also complete a copy of the side effect reporting form or report your side effect to FDA.

Side effects reports are analyzed to discover potential health product safety signals. Some important reactions may take an extremely long time to develop or occur infrequently. Continued monitoring of adverse reactions is thus essential to maintain a comprehensive safety and effectiveness profile of health products.

Cephalexin Side Effects Reported to FDA

The following Cephalexin reports list potential signals of serious risks and new safety information that were identified using the FDA Adverse Event Reporting System (FAERS).
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 Cephalexin 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 found a causal relationship between the drug and the listed risk.
Tendonitis
on Mar 05, 2014 Male from US , 42 years of age, weighting 235.0 lb, was diagnosed with and was treated with Cephalexin. Directly after, patient experienced the unwanted or unexpected Cephalexin side effects: tendonitis. Cephalexin dosage: One Capsule, Three Times Daily, Taken By Mouth.

Pruritus, Rash Macular, Erythema, Eye Swelling, Dyspnoea, Swelling Face
Patient was taking Cephalexin. Patient felt the following Cephalexin side effects: pruritus, rash macular, erythema, eye swelling, dyspnoea, swelling face on Feb 27, 2014 from US Additional patient health information: Female , 62 years of age, weighting 151.0 lb, was diagnosed with and. Cephalexin dosage: N/A.

Skin Discolouration
Adverse event was reported on Feb 06, 2014 by a Female taking Cephalexin (Dosage: N/A) was diagnosed with and. Location: US , 82 years of age, weighting 160.0 lb, After Cephalexin was administered, patient encountered several Cephalexin side effects: skin discolouration.
Multiple concurrent drugs taken:
  • Atenolol
  • Amlodipine Besilate
  • Pradaxa
  • Multiple Vitamin 1 A Day Women
  • Iron
  • Pot
  • Magnesium
  • B12 Shot


Accidental Exposure To Product
on Jan 31, 2014 Female from COUNTRY NOT SPECIFIED , 29 years of age, was treated with Cephalexin. Directly after, patient experienced the unwanted or unexpected Cephalexin side effects: accidental exposure to product. Cephalexin dosage: N/A.
Associated medications used:
  • Imipramine
  • Imipramine
  • Imipramine
  • Imipramine
  • Risperidone
  • Lisdexamfetamine
  • Acetaminophen
Patient was hospitalized.


Polymyalgia Rheumatica, Psoriasis
on Jan 29, 2014 Male from US , 77 years of age, weighting 225.8 lb, was diagnosed with and was treated with Cephalexin Capsules Usp 500mg. Patient felt the following Cephalexin side effects: polymyalgia rheumatica, psoriasis. Cephalexin Capsules Usp 500mg dosage: 4 Df, Daily.
Multiple prescriptions taken:
  • Crestor
  • Ramipril


Weight Decreased, Dysgeusia, Dizziness
Patient was taking Cephalexin. After Cephalexin was administered, patient encountered several Cephalexin side effects: weight decreased, dysgeusia, dizziness on Jan 24, 2014 from US Additional patient health information: Male , 76 years of age, weighting 160.1 lb, was diagnosed with and. Cephalexin dosage: N/A.
Multiple concurrent drugs taken:
  • Multivitamins


Clostridium Difficile Colitis, Gastrointestinal Stoma Output Increased, Disease Recurrence
Adverse event was reported on Jan 07, 2014 by a Male taking Cephalexin (Dosage: N/A) was diagnosed with and. Location: US , 59 years of age, weighting 165.8 lb, Directly after, patient experienced the unwanted or unexpected Cephalexin side effects: clostridium difficile colitis, gastrointestinal stoma output increased, disease recurrence.
Associated medications used:
  • Ertapenem
Patient was hospitalized.

Fatigue, Asthenia, Paraesthesia, Hypoaesthesia, Pruritus, Nausea, Syncope, Muscular Weakness, Vulvovaginal Discomfort
on Jan 07, 2014 Female from US , 29 years of age, weighting 179.0 lb, was diagnosed with and was treated with Cephalexin. Patient felt the following Cephalexin side effects: fatigue, asthenia, paraesthesia, hypoaesthesia, pruritus, nausea, syncope, muscular weakness, vulvovaginal discomfort. Cephalexin dosage: One Capsule Twice Daily Taken By Mouth.

Pruritus
on Jan 02, 2014 Female from US , 27 years of age, weighting 146.0 lb, was diagnosed with and was treated with Cephalexin. After Cephalexin was administered, patient encountered several Cephalexin side effects: pruritus. Cephalexin dosage: N/A.

Asthenia, Cholestasis, Cholangitis
Patient was taking Cephalexin. Directly after, patient experienced the unwanted or unexpected Cephalexin side effects: asthenia, cholestasis, cholangitis on Dec 20, 2013 from US Additional patient health information: Male , 74 years of age, weighting 236.8 lb, . Cephalexin dosage: N/A. Patient was hospitalized.

Diarrhoea, Abdominal Pain Upper, Flatulence, Abdominal Distension, Pyrexia
Adverse event was reported on Dec 11, 2013 by a Female taking Cephalexin (Dosage: 20 Twice Daily, Taken By Mouth) was diagnosed with and. Location: US , 29 years of age, weighting 140.0 lb, Patient felt the following Cephalexin side effects: diarrhoea, abdominal pain upper, flatulence, abdominal distension, pyrexia.

Cardio-respiratory Arrest
on Dec 04, 2013 Female from US , 40 years of age, was treated with Cephalexin. After Cephalexin was administered, patient encountered several Cephalexin side effects: cardio-respiratory arrest. Cephalexin dosage: N/A.
Multiple concurrent drugs taken:
  • Quetiapine
  • Oxycodone (oxycodone)
  • Paroxetine (paroxetine)


Renal Failure Acute, Tubulointerstitial Nephritis, Haemodialysis, Hypersensitivity, Somnolence
on Dec 04, 2013 Male from US , child 2 years of age, weighting 26.01 lb, was diagnosed with and was treated with Cephalexin. Directly after, patient experienced the unwanted or unexpected Cephalexin side effects: renal failure acute, tubulointerstitial nephritis, haemodialysis, hypersensitivity, somnolence. Cephalexin dosage: N/A. Patient was hospitalized and became disabled.

Completed Suicide
Patient was taking Cephalexin. Patient felt the following Cephalexin side effects: completed suicide on Dec 03, 2013 from US Additional patient health information: Male , 23 years of age, . Cephalexin dosage: N/A.
Multiple prescriptions taken:
  • Benztropine


Muscle Spasms
Adverse event was reported on Nov 18, 2013 by a Male taking Cephalexin (Dosage: 1 Pill Per 8 Hours?three Times Daily ?taken By Mouth) was diagnosed with and. Location: US , 54 years of age, weighting 155.0 lb, After Cephalexin was administered, patient encountered several Cephalexin side effects: muscle spasms.

Dizziness, Angioedema
on Oct 31, 2013 Male from US , 40 years of age, weighting 232.4 lb, was diagnosed with and was treated with Cephalexin. Directly after, patient experienced the unwanted or unexpected Cephalexin side effects: dizziness, angioedema. Cephalexin dosage: N/A. Patient was hospitalized.

Clostridium Difficile Colitis, Pyrexia, Mental Status Changes, Decreased Appetite
on Oct 30, 2013 Male from US , weighting 261.5 lb, was treated with Cephalexin. Patient felt the following Cephalexin side effects: clostridium difficile colitis, pyrexia, mental status changes, decreased appetite. Cephalexin dosage: N/A. Patient was hospitalized.


Patient was taking Cephalexin. on Oct 31, 2013 from US Additional patient health information: Patient , 68 years of age, was diagnosed with and. Cephalexin dosage: N/A.

Blister, Rash Maculo-papular, Pruritus, Scratch, Haemorrhage, Scab
Adverse event was reported on Oct 29, 2013 by a Female taking Cephalexin (Dosage: N/A) was diagnosed with and. Location: US , child 5 years of age, weighting 50.99 lb, Directly after, patient experienced the unwanted or unexpected Cephalexin side effects: blister, rash maculo-papular, pruritus, scratch, haemorrhage, scab.

Rash, Dry Skin
on Oct 29, 2013 Female from US , 71 years of age, weighting 137.0 lb, was treated with Cephalexin. Patient felt the following Cephalexin side effects: rash, dry skin. Cephalexin dosage: 250 Four Times Daily.

Dyspepsia, Decreased Appetite, Nausea, Abdominal Pain Upper, Fatigue
on Oct 29, 2013 Male from US , 51 years of age, weighting 150.0 lb, was diagnosed with and was treated with Cephalexin. After Cephalexin was administered, patient encountered several Cephalexin side effects: dyspepsia, decreased appetite, nausea, abdominal pain upper, fatigue. Cephalexin dosage: 1 Capsule Twice Daily Taken By Mouth.

Feeling Cold, Piloerection, Swelling, Infection, No Therapeutic Response
Patient was taking Cephalexin. Directly after, patient experienced the unwanted or unexpected Cephalexin side effects: feeling cold, piloerection, swelling, infection, no therapeutic response on Oct 21, 2013 from US Additional patient health information: Female , 17 years of age, weighting 150.0 lb, was diagnosed with and. Cephalexin dosage: 1 Capsule, Three Times Daily, Taken By Mouth.

Renal Failure Acute
Adverse event was reported on Oct 16, 2013 by a Male taking Cephalexin (Dosage: N/A) was diagnosed with and. Location: US , 65 years of age, weighting 190.5 lb, Patient felt the following Cephalexin side effects: renal failure acute.
Multiple prescriptions taken:
  • Ciprofloxacin
Patient was hospitalized.

Nervous System Disorder, Agitation, Confusional State, Dizziness, Somnolence, Headache, Lethargy, Pneumonia, Syncope
on Oct 03, 2013 Female from GB , 80 years of age, was diagnosed with and was treated with Cephalexin. After Cephalexin was administered, patient encountered several Cephalexin side effects: nervous system disorder, agitation, confusional state, dizziness, somnolence, headache, lethargy, pneumonia, syncope. Cephalexin dosage: 2.00 Timer Per 1.0days.
Multiple concurrent drugs taken:
  • Bisoprolol(bisoprolol)
  • Warfarin(warfarin)
Patient was hospitalized.

Joint Stiffness, Pain, Arthralgia
on Oct 03, 2013 Female from GB , 93 years of age, weighting 116.8 lb, was treated with Cephalexin. Directly after, patient experienced the unwanted or unexpected Cephalexin side effects: joint stiffness, pain, arthralgia. Cephalexin dosage: N/A.
Associated medications used:
  • Aspirin(aspirin)
  • Losartan(losartan)
  • Bisoprolol(bisoprolol)
  • Clopidogrel(clopidogrel)
  • Omeprazole(omeprazole)
  • Angeze/monomaxsr(angeze/monomax Sr)trimethoprim(trimethoprim)
  • Betamethasone Valerate(bethamethasone Valerate)doublebase(doublebase)
  • Co-codamol(co-codamol_


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Keep Track of Side Effects

Note Your Observations

It is really important to keep of your symptoms, right from the time you start a new medicine. You can do it any way you prefer: in a notebook, in a computer file or using our online tool. You should also note down any other medicines you are taking at the same time, because there could be an interaction between these medicines.

Why Your Notes are Important

Your notes could be helpful in several ways:

  • You can use them to remind you of details that may alert your health care professional(s) to a problem
  • You will have a record to refer to in the future, in case you are ever prescribed the same medicine again

  • Log Form

    You can use the following log form to write down important information, like the date and time you experienced a side effect and your symptoms, how strong the symptoms were, and any other medicines you were using.

    Medicine Name and Dosage:

     

    Side Effects

    Scale

    Date & Time

    Other Medicine(s) or Treatment(s)

     

     

     

     

    Scale: 1 = very mild to 10 = very bad


    Track Online

  • User Sign In
  • Register to track your side effects

  • 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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