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Bad Mouth Taste (175)
Stomach Pains (73)
Fatigue (67)
Servere Sleepiness (48)
Abdominal Pain (35)
Body Pain Over All Bones (34)
Stomach Pain (27)
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Klacid Side Effects and Adverse Effects reported to US Food and Drug Administration (FDA)

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Showing 1-25 of 335 

Asthenia, Dermatitis Allergic, Nausea (7200802-2)
on Dec 20, 2010 Female from LITHUANIA , 19 years of age, was diagnosed with
  • bronchitis
and was treated with Klacid Sr Modified Released Tablets. Directly after, patient experienced the unwanted or unexpected Klacid side effects: asthenia, dermatitis allergic, nausea. Klacid Sr Modified Released Tablets dosage: Once Per Day.

Gastritis, Hepatitis Acute (7198820-6)
Patient was taking Klacid Forte Tablets. Patient felt the following Klacid side effects: gastritis, hepatitis acute on Dec 22, 2010 from GERMANY Additional patient health information: Male , 77 years of age, weighting 167.6 lb, was diagnosed with
  • pneumonia
and. Klacid Forte Tablets dosage: N/A. Patient was hospitalized.

Gastritis, Hepatitis Acute (7185551-1)
Adverse event was reported on Dec 17, 2010 by a Male taking Klacid Forte Tablets (Dosage: N/A) was diagnosed with
  • pneumonia
and. Location: GERMANY , 77 years of age, weighting 167.6 lb, After Klacid was administered, patient encountered several Klacid side effects: gastritis, hepatitis acute. Patient was hospitalized.

Hepatitis Acute (7180670-8)
on Dec 17, 2010 Female from GERMANY , 56 years of age, weighting 156.5 lb, was diagnosed with
  • pneumonia
and was treated with Klacid I.v.. Directly after, patient experienced the unwanted or unexpected Klacid side effects: hepatitis acute. Klacid I.v. dosage: N/A. Patient was hospitalized.


Nausea, Suicide Attempt, Vomiting (7171425-9)
on Dec 08, 2010 Female from GERMANY , weighting 154.3 lb, was diagnosed with
  • suicide attempt
and was treated with Klacid Tablets. Patient felt the following Klacid side effects: nausea, suicide attempt, vomiting. Klacid Tablets dosage: 10 X 250 Mg Once. Patient was hospitalized.

Abasia, Mental Disorder (7164494-3)
Patient was taking Klacid. After Klacid was administered, patient encountered several Klacid side effects: abasia, mental disorder on Dec 09, 2010 from AUSTRIA Additional patient health information: Female , 79 years of age, was diagnosed with
  • infection
and. Klacid dosage: N/A.
Multiple concurrent drugs taken:
  • Quetiapine Fumarate
Patient was hospitalized.

Pruritus, Rash Erythematous, Urticaria (7164171-9)
Adverse event was reported on Dec 10, 2010 by a Male taking Klacid (Dosage: N/A) . Location: AUSTRALIA , 34 years of age, Directly after, patient experienced the unwanted or unexpected Klacid side effects: pruritus, rash erythematous, urticaria.
Associated medications used:
  • Nexium
  • Esomeprazole Magnesium Trihydrate
  • Amoxicillin
Patient was hospitalized.

Suicide Attempt (7139593-2)
on Nov 27, 2010 Female from GERMANY , weighting 154.3 lb, was diagnosed with
  • suicide attempt
and was treated with Klacid Tablets. Patient felt the following Klacid side effects: suicide attempt. Klacid Tablets dosage: 10 X 250 Mg Once. Patient was hospitalized.

Abortion Spontaneous (7138089-1)
on Nov 29, 2010 Female from SWITZERLAND , 32 years of age, was diagnosed with
  • upper respiratory tract infection
and was treated with Klacid. After Klacid was administered, patient encountered several Klacid side effects: abortion spontaneous. Klacid dosage: N/A.
Multiple concurrent drugs taken:
  • Prednisone (High Dose)
  • Symbicort (Long Term)


Angioedema (7094217-8)
Patient was taking Klacid. Directly after, patient experienced the unwanted or unexpected Klacid side effects: angioedema on Nov 03, 2010 from SINGAPORE Additional patient health information: Female , 69 years of age, . Klacid dosage: N/A.

Myopathy (7077499-8)
Adverse event was reported on Oct 21, 2010 by a Female taking Klacid (Dosage: N/A) was diagnosed with
  • gastritis
  • helicobacter test positive
  • hyperlipidaemia
  • hypertriglyceridaemia
and. Location: SWEDEN , 61 years of age, Patient felt the following Klacid side effects: myopathy. Patient was hospitalized.

Abdominal Pain Upper, Dehydration, Diarrhoea (7077497-4)
on Oct 25, 2010 Female from GERMANY , 83 years of age, weighting 154.3 lb, was diagnosed with
  • helicobacter gastritis
and was treated with Klacid. After Klacid was administered, patient encountered several Klacid side effects: abdominal pain upper, dehydration, diarrhoea. Klacid dosage: N/A.
Multiple concurrent drugs taken:
  • Amoxicillin
  • Aspirin
  • Clobidogrel
  • Pantoprazole Sodium
  • Coaprovel (150mg Irbesatan/12.5mg Hydrochlorothiazid)
  • Bisoprolol
  • Simvastatin
Patient was hospitalized.

Myalgia (7076994-5)
on Oct 27, 2010 Female from SWEDEN , 61 years of age, was diagnosed with
  • gastritis
  • helicobacter test positive
  • hyperlipidaemia
  • hypertriglyceridaemia
and was treated with Klacid. Directly after, patient experienced the unwanted or unexpected Klacid side effects: myalgia. Klacid dosage: N/A. Patient was hospitalized.

Lung Neoplasm (7074021-7)
Patient was taking Klacid. Patient felt the following Klacid side effects: lung neoplasm on Oct 21, 2010 from CZECH REPUBLIC Additional patient health information: Male , weighting 143.3 lb, was diagnosed with
  • bronchopneumonia
and. Klacid dosage: N/A.
Multiple prescriptions taken:
  • Euphyllin


Asthma, Pneumonia Viral (7069366-0)
Adverse event was reported on Oct 28, 2010 by a Female taking Klacid Granules For Oral Suspension (Dosage: N/A) . Location: THAILAND , child 4 years of age, weighting 32.85 lb, After Klacid was administered, patient encountered several Klacid side effects: asthma, pneumonia viral.
Multiple concurrent drugs taken:
  • Ibuprofen
  • Ibuprofen
  • Salbutamol
  • Salbutamol (0.5ml In Nss 2.5 Ml Tid, Nebuliser)
  • Ambroxol
Patient was hospitalized.

Asthma, Pneumonia Viral (7065864-4)
on Nov 21, 2009 Female from THAILAND , child 4 years of age, weighting 32.85 lb, was treated with Klacid Granules For Oral Suspension. Directly after, patient experienced the unwanted or unexpected Klacid side effects: asthma, pneumonia viral. Klacid Granules For Oral Suspension dosage: N/A.
Associated medications used:
  • Ibuprofen
  • Ibuprofen
  • Salbutamol
  • Salbutamol (0.5ml In Nss 2.5 Ml Tid, Nebuliser)
  • Ambroxol
Patient was hospitalized.

Cough, Hypophagia, Pneumonia (7065834-6)
on Nov 21, 2009 Female from THAILAND , child 3 years of age, weighting 31.97 lb, was treated with Klacid Granules For Oral Suspension. Patient felt the following Klacid side effects: cough, hypophagia, pneumonia. Klacid Granules For Oral Suspension dosage: N/A.
Multiple prescriptions taken:
  • Carbocysteine Syrup
  • Cetirizine Hcl
Patient was hospitalized.

Myalgia (7058769-6)
Patient was taking Klacid. After Klacid was administered, patient encountered several Klacid side effects: myalgia on Oct 14, 2010 from SWEDEN Additional patient health information: Female , 61 years of age, was diagnosed with
  • gastritis
  • helicobacter test positive
  • hyperlipidaemia
  • hypertriglyceridaemia
and. Klacid dosage: N/A. Patient was hospitalized.

Bronchopneumonia, Rash (7018619-0)
Adverse event was reported on Sep 21, 2010 by a Male taking Klacid Tablets (Dosage: N/A) was diagnosed with
  • bronchopneumonia
  • psoriasis
and. Location: GERMANY , weighting 233.7 lb, Directly after, patient experienced the unwanted or unexpected Klacid side effects: bronchopneumonia, rash.
Associated medications used:
  • Humira
  • Humira
  • Ampicillin Sodium
Patient was hospitalized.

Hypertension, Renal Artery Stenosis, Renal Failure Acute, Vomiting (6988365-8)
on Sep 06, 2010 Patient from GERMANY , 79 years of age, was treated with Klacid Forte. Patient felt the following Klacid side effects: hypertension, renal artery stenosis, renal failure acute, vomiting. Klacid Forte dosage: Film Coated,bid,cumulated Dose7000mg.
Multiple prescriptions taken:
  • Diovan (Opd,oral,cumulated 320mg)
  • Co Diovan 160/25 Rep. 160/12.5mg Tablet (Opd, Break11-13 Apr 2010)
  • Xenetix (Once 5265mg, Opd, Cumulated:42120mg)
  • Meropenem
  • Meropenem
  • Rocephin (2000mg Once Daily,cumulated 16000mg)
Patient was hospitalized.

Hepatotoxicity, Neutropenia (6961820-2)
on Aug 24, 2010 Female from SPAIN , 51 years of age, was diagnosed with
  • mycobacterium avium complex infection
and was treated with Klacid Tablets. After Klacid was administered, patient encountered several Klacid side effects: hepatotoxicity, neutropenia. Klacid Tablets dosage: N/A.
Multiple concurrent drugs taken:
  • Ansatipin
  • Myambutol
  • Omeprazole
  • Sertraline Hydrochloride
  • Aspirin
Patient was hospitalized.

Toxic Epidermal Necrolysis (6916677-2)
Patient was taking Klacid. Directly after, patient experienced the unwanted or unexpected Klacid side effects: toxic epidermal necrolysis on Aug 02, 2010 from SINGAPORE Additional patient health information: Male , 67 years of age, . Klacid dosage: N/A.
Associated medications used:
  • Amoxicillin
  • Bisoprolol
  • Enalapril
  • Prilosec
  • Lovastatin
  • Ticlid
  • Isosorbide Dinitrate
Patient was hospitalized.

Bronchopneumonia (6909469-1)
Adverse event was reported on Jul 26, 2010 by a Male taking Klacid (Dosage: N/A) was diagnosed with
  • bronchopneumonia
  • hypertension
and. Location: CZECH REPUBLIC , 42 years of age, Patient felt the following Klacid side effects: bronchopneumonia.
Multiple prescriptions taken:
  • Emzok
  • Tenaxum
  • Felodipine
  • Nolpaza
Patient was hospitalized.

Aggression, Grand Mal Convulsion, Restlessness (6888828-X)
on Jul 21, 2010 Male from , 76 years of age, was treated with Klacid. After Klacid was administered, patient encountered several Klacid side effects: aggression, grand mal convulsion, restlessness. Klacid dosage: N/A.
Multiple concurrent drugs taken:
  • Leponex
  • Leponex
  • Leponex
  • Leponex
  • Delix
  • Delix 2.5plus/-5 Plus
  • Phenytoin
  • Levodopa
Patient was hospitalized.

Dehydration, Vertigo, Vomiting (6870796-8)
on Jul 13, 2010 Female from CZECH REPUBLIC , weighting 160.9 lb, was diagnosed with
  • bronchopneumonia
  • rheumatoid arthritis
  • body temperature increased
  • cough
and was treated with Klacid. Directly after, patient experienced the unwanted or unexpected Klacid side effects: dehydration, vertigo, vomiting. Klacid dosage: N/A.
Associated medications used:
  • Ibalgin
  • Paralen (Qid)
  • Mucosolvan
Patient was hospitalized.

Showing 1-25 of 335 

Klacid Health Episodes

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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.

Klacid Information

More About Klacid

Side Effects reported to FDA: 335. View Klacid Adverse Reports

Klacid safety alerts: No

Reported deaths: 23

Reported hospitalizations: 87

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Before Taking Klacid

Find Out How to Take Klacid

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