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Stiff Neck (28)
Dizziness (23)
Vision (18)
Abdominal Pain (17)
Leg Cramps (15)
Skin Rash (15)
Dizzy, Stiff Neck, Vision (11)
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Bactrim Side Effects and Adverse Effects reported to US Food and Drug Administration (FDA)

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Showing 1-25 of 971 

Diarrhoea, Skin Hyperpigmentation, Alanine Aminotransferase Increased, Gamma-glutamyltransferase Increased, Coagulation Factor V Level Decreased, Ascites, Vomiting, Hyperthermia, Cardiac Arrest (8401259-6)
on Aug 09, 2011 Male from FRANCE , child 3 years of age, was treated with Bactrim Balsamico (guaifenesin, Sulfamethoxazole, Trimethoprim). Directly after, patient experienced the unwanted or unexpected Bactrim side effects: diarrhoea, skin hyperpigmentation, alanine aminotransferase increased, gamma-glutamyltransferase increased, coagulation factor v level decreased, ascites, vomiting, hyperthermia, cardiac arrest. Bactrim Balsamico (guaifenesin, Sulfamethoxazole, Trimethoprim) dosage: N/A.
Associated medications used:
  • Thiotepa
  • Micafungin (micafungin)
  • Busulfex (15 Mg Milligram(s), Qid, Intravenous)
  • Nexium
  • Vancomycin
  • Tazocilline (piperacillin Sodium, Tazobactam Sodium)
  • Amikin
  • Lasilix (furosemide Sodium)
Patient was hospitalized.

Liver Function Test Abnormal, Gallbladder Disorder (8388365-X)
Patient was taking Bactrim Ds. Patient felt the following Bactrim side effects: liver function test abnormal, gallbladder disorder on May 17, 2012 from UNITED STATES Additional patient health information: Male , weighting 229.0 lb, was diagnosed with
  • urinary tract infection
  • anxiety
  • neuralgia
  • depression
  • hypertension
and. Bactrim Ds dosage: 1 Tab, 2x/day.
Multiple prescriptions taken:
  • Citalopram Hydrobromide
  • Pregabalin (300 Mg, 2x/day)
  • Citalopram Hydrobromide (20 Mg, 1x/day)
  • Potassium Chloride (20meq, 1x/day)


Pulmonary Alveolar Haemorrhage, Infection (8386521-8)
Adverse event was reported on May 23, 2012 by a Female taking Bactrim (Dosage: N/A) . Location: UNITED STATES , 53 years of age, weighting 174.2 lb, After Bactrim was administered, patient encountered several Bactrim side effects: pulmonary alveolar haemorrhage, infection.
Multiple concurrent drugs taken:
  • Zovirax
  • Prevacid
  • Calcium Carbonate/vitamin D
  • Neurontin
  • Aspirin
  • Oxycodone -roxicodone-
  • Bortezomib
  • Revlimid (10mg Daily -day 1-10- Po)
Patient was hospitalized.

Rash Pruritic (8381972-X)
on Aug 16, 2011 Female from UNITED STATES , 64 years of age, was treated with Bactrim. Directly after, patient experienced the unwanted or unexpected Bactrim side effects: rash pruritic. Bactrim dosage: N/A.
Associated medications used:
  • Folic Acid
  • Centrum (centrum)
  • Revlimid (10 Mg, Daily For 21 Days On Then 7 Days Off, Po ; 5 Mg, Qd X 21 Days, Po)
  • Revlimid (10 Mg, Daily For 21 Days On Then 7 Days Off, Po ; 5 Mg, Qd X 21 Days, Po)
  • Acyclovir
  • Prozac
  • Multivitamin



Neuropathy Peripheral (8377257-8)
on Mar 23, 2011 Female from UNITED STATES , 74 years of age, was treated with Bactrim. Patient felt the following Bactrim side effects: neuropathy peripheral. Bactrim dosage: N/A.
Multiple prescriptions taken:
  • Revlimid (25 Mg, Qd X 3 Weeks, Po)
  • Acyclovir
  • Dexamethasone


Squamous Cell Carcinoma, Tumour Invasion (8374100-8)
Patient was taking Bactrim. After Bactrim was administered, patient encountered several Bactrim side effects: squamous cell carcinoma, tumour invasion on May 17, 2012 from UNITED STATES Additional patient health information: Male , 62 years of age, weighting 184.1 lb, was diagnosed with
  • prophylaxis
  • cardiovascular event prophylaxis
and. Bactrim dosage: 1 Df, Qd.
Multiple concurrent drugs taken:
  • Aspirin (Unk)
  • Myfortic (360 Mg, Qd)
  • Simvastatin (80 Mg, Unk)
  • Calcium Carbonate (2 Df, Unk)
  • Vitamin D (1000 U, Qd)
  • Lovaza (1 G, Qd)
  • Myfortic (360 Mg, Bid)
  • Myfortic (180 Mg, Qd)


Hallucination, Malaise, Disturbance In Attention, Presyncope, Loss Of Consciousness (8373140-2)
Adverse event was reported on May 16, 2012 by a Female taking Bactrim (Dosage: N/A) . Location: FRANCE , 62 years of age, weighting 110.2 lb, Directly after, patient experienced the unwanted or unexpected Bactrim side effects: hallucination, malaise, disturbance in attention, presyncope, loss of consciousness.
Associated medications used:
  • Certican
  • Vitamin B1 And B6
  • Cancidas
  • Zovirax
  • Vitabact
  • Vfend (Unk)
  • Prednisone Tab
  • Calcium Carbonate
Patient was hospitalized.

Cardiomyopathy, Convulsion (8370721-7)
on May 08, 2012 Female from UNITED STATES , weighting 110.2 lb, was diagnosed with
  • prophylaxis
  • hypertension
and was treated with Bactrim. Patient felt the following Bactrim side effects: cardiomyopathy, convulsion. Bactrim dosage: 1 Tab Tid.
Multiple prescriptions taken:
  • Amlodipine Besylate (7.5 Mg, Qd)
  • Amlodipine Besylate (7.5 Mg, Qd)
  • Prednisolone (60 Mg, Qd)
  • Calcium Carbonate (1000 Mg, Tid)
  • Cefdinir (300 Mg Qhs)
  • Folic Acid (1 Mg, Qd)
  • M.v.i. (1 Tab, Qd)
  • Pantoprazole (40 Mg, Qd)


Oedema Peripheral, Respiratory Distress, Pneumonia (8367526-X)
on Nov 22, 2011 Male from UNITED STATES , 93 years of age, was treated with Bactrim Ds. After Bactrim was administered, patient encountered several Bactrim side effects: oedema peripheral, respiratory distress, pneumonia. Bactrim Ds dosage: N/A.
Multiple concurrent drugs taken:
  • Promethazine Hcl
  • Nephrocaps (nephrocaps)
  • Omeprazole
  • Toprol-xl
  • Calcium Carbonate
  • Acidophilus (lactobacillus Acidophilus)
  • Revlimid (5 Mg, X 21 Caps, Po)
  • Acyclovir


Febrile Neutropenia (8367133-9)
Patient was taking Bactrim. Directly after, patient experienced the unwanted or unexpected Bactrim side effects: febrile neutropenia on Jul 22, 2011 from UNITED STATES Additional patient health information: Male , 62 years of age, weighting 205.0 lb, . Bactrim dosage: N/A. Patient was hospitalized.

Renal Failure, Hypertension, Serum Ferritin Increased (8366312-4)
Adverse event was reported on May 14, 2012 by a Male taking Bactrim (Dosage: N/A) was diagnosed with
  • prophylaxis
and. Location: TURKEY , weighting 79.37 lb, Patient felt the following Bactrim side effects: renal failure, hypertension, serum ferritin increased.
Multiple prescriptions taken:
  • Exjade (28 Mg/kg, Unk)
  • Cyclosporine (6 Mg/kg, Unk)
  • Exjade (500 Mg, Unk)
Patient was hospitalized.

Febrile Neutropenia, Blood Creatinine Increased (8364472-2)
on May 09, 2012 Male from UNITED STATES , 51 years of age, was treated with Bactrim. After Bactrim was administered, patient encountered several Bactrim side effects: febrile neutropenia, blood creatinine increased. Bactrim dosage: N/A.
Multiple concurrent drugs taken:
  • Atovaquone
  • Arzerra (2000mg Weekly)
  • Levofloxacin
  • Allopurinol
  • Fluconazole
  • Acyclovir
Patient was hospitalized.

Cholelithiasis, Shock Haemorrhagic, Cholangitis Acute (8359907-5)
on May 10, 2012 Male from SWITZERLAND , 42 years of age, was treated with Bactrim. Directly after, patient experienced the unwanted or unexpected Bactrim side effects: cholelithiasis, shock haemorrhagic, cholangitis acute. Bactrim dosage: 160 Mg, Three Per One Week.
Associated medications used:
  • Prednisone (25 Mg, 1x/day)
  • Codeine (50 Mg, 4x/day)
  • Vfend (350 Mg, 2x/day)
  • Ciprofloxacin (500 Mg, 1x/day)
Patient was hospitalized.

Pneumonia, Neutrophil Count Decreased, White Blood Cell Count Decreased, Platelet Count Decreased (8359249-8)
Patient was taking Bactrim. Patient felt the following Bactrim side effects: pneumonia, neutrophil count decreased, white blood cell count decreased, platelet count decreased on May 08, 2012 from JAPAN Additional patient health information: Male , weighting 180.8 lb, . Bactrim dosage: N/A.
Multiple prescriptions taken:
  • Lasix
  • Vidaza (75 Milligram/sq. Meter)
  • Desyrel
  • Vidaza (75 Milligram/sq. Meter)
  • Clarithromycin
  • Magmitt
  • Miya Bm
  • Itraconazole


Hypertension, Mental Disorder, Pulmonary Embolism, Pain, Pulmonary Fibrosis, Anxiety, Emotional Distress, Injury (8355965-2)
Adverse event was reported on May 07, 2012 by a Female taking Bactrim Ds (Dosage: N/A) was diagnosed with
  • pilonidal cyst
and. Location: UNITED STATES , 26 years of age, weighting 214.0 lb, After Bactrim was administered, patient encountered several Bactrim side effects: hypertension, mental disorder, pulmonary embolism, pain, pulmonary fibrosis, anxiety, emotional distress, injury.
Multiple concurrent drugs taken:
  • Xanax
  • Yaz (Unk)
  • Prinivil (Unk Unk, Qd)
  • Yaz
  • Septra Ds (Unk Unk, Bid)
  • Lortab (5/500, Prn)
Patient was hospitalized.

Deep Vein Thrombosis, Injury, Emotional Distress, Pain, Anxiety (8350197-6)
on May 03, 2012 Female from UNITED STATES , 31 years of age, weighting 254.0 lb, was diagnosed with
  • acute sinusitis
and was treated with Bactrim. Directly after, patient experienced the unwanted or unexpected Bactrim side effects: deep vein thrombosis, injury, emotional distress, pain, anxiety. Bactrim dosage: Unk Unk, Bid.
Associated medications used:
  • Yaz (Unk)
  • Yasmin (Unk)
  • Motrin (600 Mg, Tid)
  • Dextromethorphan Hydrobromide
  • Drospirenone And Ethinyl Estradiol (Unk)
  • Ibuprofen (advil)
  • Loestrin 1.5/30


Enteritis Infectious (8350175-7)
on Apr 25, 2012 Female from UNITED STATES , 59 years of age, weighting 125.0 lb, was treated with Bactrim Ds. Patient felt the following Bactrim side effects: enteritis infectious. Bactrim Ds dosage: 800-160 Mg 1 Tablet Every 12 Hours.
Multiple prescriptions taken:
  • Crestor
  • Aspirin (Daily Dose: 81 Mg)
Patient was hospitalized.

Stevens-johnson Syndrome (8337654-3)
Patient was taking Bactrim Ds. After Bactrim was administered, patient encountered several Bactrim side effects: stevens-johnson syndrome on May 04, 2012 from UNITED STATES Additional patient health information: Female , 41 years of age, weighting 224.9 lb, was diagnosed with
  • abscess limb
and. Bactrim Ds dosage: |freq: Bid||route: Oral|. Patient was hospitalized.

Mental Status Changes, Pyrexia, Influenza Like Illness, Convulsion (8330529-5)
Adverse event was reported on Apr 03, 2012 by a Female taking Bactrim (Dosage: N/A) . Location: UNITED STATES , 13 years of age, Directly after, patient experienced the unwanted or unexpected Bactrim side effects: mental status changes, pyrexia, influenza like illness, convulsion.
Associated medications used:
  • Enbrel (25 Mg, 2 Times/wk)


Pulmonary Embolism, Perirenal Haematoma (8322856-2)
on Apr 17, 2012 Male from FRANCE , weighting 180.8 lb, was treated with Bactrim. Patient felt the following Bactrim side effects: pulmonary embolism, perirenal haematoma. Bactrim dosage: N/A.
Multiple prescriptions taken:
  • Prednisone Tab
  • Fluindione
  • Ditropan
  • Mycophenolate Mofetil (cellcept)
  • Prednisone Tab
  • Cyclosporine
  • Heparin Sodium
  • Lasix
Patient was hospitalized.

Dizziness, Blood Pressure Increased (8320429-9)
on Apr 26, 2012 Male from UNITED STATES , weighting 190.0 lb, was treated with Bactrim. After Bactrim was administered, patient encountered several Bactrim side effects: dizziness, blood pressure increased. Bactrim dosage: N/A.

Pneumonia, Pulmonary Alveolar Haemorrhage (8317891-4)
Patient was taking Bactrim. Directly after, patient experienced the unwanted or unexpected Bactrim side effects: pneumonia, pulmonary alveolar haemorrhage on Apr 20, 2012 from JAPAN Additional patient health information: Female , 66 years of age, weighting 97.00 lb, . Bactrim dosage: 2400/480 Mg.
Associated medications used:
  • Adenosine Triphosphate (500 Mg, Unk)
  • Micafungin Sodium (75 Mg, Unk)
  • Pentamidine Isethionate (150 Mg, Unk)
  • Argatroban (0.7mcg/kg/min)
  • Heparin Sodium (Unk)
  • Cotrim (2400/480 Mg)
  • Vancomycin (1.5 G, Unk)
  • Warfarin (2 Mg, Unk)


Anaphylactic Reaction (8313903-2)
Adverse event was reported on Apr 26, 2012 by a Male taking Bactrim (Dosage: N/A) was diagnosed with
  • arthropod bite
and. Location: UNITED STATES , 49 years of age, weighting 183.0 lb, Patient felt the following Bactrim side effects: anaphylactic reaction. Patient was hospitalized.

Stevens-johnson Syndrome, Vision Blurred, Dizziness, Hypertension, Bradycardia (8310625-9)
on Apr 25, 2012 Female from UNITED STATES , 38 years of age, weighting 196.0 lb, was diagnosed with
  • staphylococcal infection
and was treated with Bactrim. After Bactrim was administered, patient encountered several Bactrim side effects: stevens-johnson syndrome, vision blurred, dizziness, hypertension, bradycardia. Bactrim dosage: N/A. Patient was hospitalized.

No Therapeutic Response (8309422-X)
on Apr 24, 2012 Male from UNITED STATES , 46 years of age, was treated with Bactrim. Directly after, patient experienced the unwanted or unexpected Bactrim side effects: no therapeutic response. Bactrim dosage: #60.

Showing 1-25 of 971 

Bactrim Health Episodes

How Can Bactrim Affect You?

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It is very important to keep track of all side effects and discuss them with your doctor. If you think you may have a medical emergency, call your doctor or 911 immediately.

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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.

Bactrim Information

Alternative BACTRIM Names:SULFAMETH

Active Ingredient: SULFAMETH

More About Bactrim

Side Effects reported to FDA: 971. View Bactrim Adverse Reports

Bactrim safety alerts: No

Reported deaths: 52

Reported hospitalizations: 339

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