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Stiff Neck (28)
Dizziness (23)
Vision (18)
Abdominal Pain (17)
Skin Rash (15)
Leg Cramps (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 126-150 of 971 

Colon Cancer, Large Intestinal Ulcer, Rectal Haemorrhage (8078439-5)
on Jan 27, 2012 Male from UNITED STATES , 56 years of age, weighting 172.4 lb, was treated with Bactrim Ds. Directly after, patient experienced the unwanted or unexpected Bactrim side effects: colon cancer, large intestinal ulcer, rectal haemorrhage. Bactrim Ds dosage: N/A.
Associated medications used:
  • Colace
  • Dexamethasone (20mgpodays1,2,3,4,8,9.11)
  • Acyclovir
  • Lorazepam
  • Citalopram Hydrobromide
  • Velcade (2.5 Mg Days, 1,4,8,11)
  • Prochlorperazine
  • Oxycontin


Swelling, Face Oedema (8077879-8)
Patient was taking Bactrim. Patient felt the following Bactrim side effects: swelling, face oedema on Jan 25, 2012 from UNITED STATES Additional patient health information: Male , 20 years of age, weighting 116.8 lb, was diagnosed with
  • pneumocystis jiroveci pneumonia
  • hiv infection
and. Bactrim dosage: N/A.
Multiple prescriptions taken:
  • Isentress
  • Truvada
  • Azithromycin
Patient was hospitalized and became disabled.

Abdominal Pain Upper (8075621-8)
Adverse event was reported on Jul 19, 2011 by a Female taking Bactrim (Dosage: N/A) . Location: UNITED STATES , 19 years of age, After Bactrim was administered, patient encountered several Bactrim side effects: abdominal pain upper.
Multiple concurrent drugs taken:
  • Mepron (.5tsp Twice Per Day)
  • Azithromycin


Toxic Epidermal Necrolysis, Fatigue, Onychomadesis, Blood Pressure Decreased, Stevens-johnson Syndrome, Alopecia, Influenza (8069846-5)
on Jan 25, 2012 Female from UNITED STATES , 62 years of age, weighting 150.0 lb, was diagnosed with
  • urinary tract infection
and was treated with Bactrim. Directly after, patient experienced the unwanted or unexpected Bactrim side effects: toxic epidermal necrolysis, fatigue, onychomadesis, blood pressure decreased, stevens-johnson syndrome, alopecia, influenza. Bactrim dosage: 1 Pill. Patient was hospitalized and became disabled.


Nausea, Productive Cough, Transaminases Increased, Neoplasm Malignant, Vomiting, Joint Swelling, Dyspnoea, Oedema Peripheral, Fatigue (8069019-6)
on Dec 07, 2010 Male from UNITED STATES , 84 years of age, weighting 179.9 lb, was treated with Bactrim (sulfamethazole, Trimethoprim) Tablet. Patient felt the following Bactrim side effects: nausea, productive cough, transaminases increased, neoplasm malignant, vomiting, joint swelling, dyspnoea, oedema peripheral, fatigue. Bactrim (sulfamethazole, Trimethoprim) Tablet dosage: N/A.
Multiple prescriptions taken:
  • Megace Oral (megestrol Acetate)
  • Exjade (1000 Mg, Qd)
  • Exjade (1000 Mg, Qd)
  • Exjade (1000 Mg, Qd)
  • Exjade (1000 Mg, Qd)
  • Exjade (1000 Mg, Qd)
  • Exjade (1000 Mg, Qd)
  • Desferal
Patient was hospitalized.

Blood Sodium Decreased, Dyspnoea Exertional, Hypokalaemia, Asthenia (8059651-8)
Patient was taking Bactrim Ds. After Bactrim was administered, patient encountered several Bactrim side effects: blood sodium decreased, dyspnoea exertional, hypokalaemia, asthenia on Jan 19, 2012 from UNITED STATES Additional patient health information: Male , 80 years of age, weighting 176.4 lb, was diagnosed with
  • skin infection
and. Bactrim Ds dosage: 2 Tabs Bid Po Recent.
Multiple concurrent drugs taken:
  • M.v.i.
  • Lipitor
  • Vitamin D
  • Cozaar (12.5 Mg Daily Po Chronic)
  • Metformin Hcl
  • Aspirin
  • Fish Oil
Patient was hospitalized.

Hepatitis Acute, Leukopenia, Toxicity To Various Agents, Renal Failure Acute (8058886-8)
Adverse event was reported on Jan 19, 2012 by a Male taking Bactrim (Dosage: Po) . Location: UNITED STATES , 65 years of age, weighting 180.8 lb, Directly after, patient experienced the unwanted or unexpected Bactrim side effects: hepatitis acute, leukopenia, toxicity to various agents, renal failure acute.
Associated medications used:
  • Acetaminophen
Patient was hospitalized.

Hepatic Cirrhosis, Hepatic Neoplasm Malignant, Hepatitis C (8057934-9)
on May 09, 2011 Male from UNITED STATES , 59 years of age, was treated with Bactrim. Patient felt the following Bactrim side effects: hepatic cirrhosis, hepatic neoplasm malignant, hepatitis c. Bactrim dosage: N/A.
Multiple prescriptions taken:
  • Metoprolol Tartrate
  • Myfortic (360 Mg, Bid, Oral, 1080 Mg, Oral)
  • Trazodone Hcl


Tachycardia, Diarrhoea, Hypersensitivity, Dyspepsia, Oedema (8056355-2)
on Sep 16, 2011 Female from UNITED STATES , 40 years of age, weighting 244.7 lb, was treated with Bactrim. After Bactrim was administered, patient encountered several Bactrim side effects: tachycardia, diarrhoea, hypersensitivity, dyspepsia, oedema. Bactrim dosage: N/A.
Multiple concurrent drugs taken:
  • Lexapro
  • Rocaltrol
  • Cyclosporine (400 Mg, Daily Oral)
  • Lisinopril
  • Prednisone Tab
  • Myfortic (1440 Mg, Daily Oral)
  • Estrace
Patient was hospitalized.

Dizziness, Blood Potassium Increased, Blood Creatinine Increased, Nausea, International Normalised Ratio Increased (8050714-X)
Patient was taking Bactrim Ds. Directly after, patient experienced the unwanted or unexpected Bactrim side effects: dizziness, blood potassium increased, blood creatinine increased, nausea, international normalised ratio increased on Jan 17, 2012 from UNITED STATES Additional patient health information: Female , 86 years of age, weighting 149.5 lb, was diagnosed with
  • urinary tract infection
and. Bactrim Ds dosage: Double-strength -ds-. Patient was hospitalized.

Face Oedema, Swelling (8050127-0)
Adverse event was reported on Jan 10, 2012 by a Male taking Bactrim (Dosage: N/A) . Location: UNITED STATES , 20 years of age, weighting 116.8 lb, Patient felt the following Bactrim side effects: face oedema, swelling.
Multiple prescriptions taken:
  • Truvada
  • Azithromycin
  • Isentress
Patient was hospitalized and became disabled.

Fatigue, Myalgia, Immune Reconstitution Syndrome, Hypersensitivity, Platelet Count Decreased, Weight Decreased, Night Sweats, Vomiting (8046579-2)
on Jan 06, 2012 Male from UNITED STATES , 38 years of age, was diagnosed with
  • antifungal prophylaxis
  • hiv infection
and was treated with Bactrim. After Bactrim was administered, patient encountered several Bactrim side effects: fatigue, myalgia, immune reconstitution syndrome, hypersensitivity, platelet count decreased, weight decreased, night sweats, vomiting. Bactrim dosage: Unk.
Multiple concurrent drugs taken:
  • Complera (1 Df, Qd)
Patient was hospitalized.

Dysuria, Myopathy, Meningitis Aseptic, Hyponatraemia, Hypersensitivity (8044589-2)
on Jan 13, 2012 Female from UNITED STATES , 51 years of age, weighting 215.0 lb, was treated with Bactrim. Directly after, patient experienced the unwanted or unexpected Bactrim side effects: dysuria, myopathy, meningitis aseptic, hyponatraemia, hypersensitivity. Bactrim dosage: N/A. Patient was hospitalized.

Bronchial Hyperreactivity, Respiratory Tract Infection Viral, Dyspnoea (8043198-9)
Patient was taking Bactrim. Patient felt the following Bactrim side effects: bronchial hyperreactivity, respiratory tract infection viral, dyspnoea on Jan 06, 2012 from UNITED STATES Additional patient health information: Male , weighting 7.83 lb, . Bactrim dosage: N/A.
Multiple prescriptions taken:
  • Synagis
  • Regular Vaccinations
  • Synagis
Patient was hospitalized.

Thrombotic Microangiopathy, Convulsion, Fall, Head Injury, Haemorrhage Intracranial (8037234-3)
Adverse event was reported on Dec 29, 2011 by a Male taking Bactrim (Dosage: Oral) . Location: FRANCE , 19 years of age, After Bactrim was administered, patient encountered several Bactrim side effects: thrombotic microangiopathy, convulsion, fall, head injury, haemorrhage intracranial.
Multiple concurrent drugs taken:
  • Leucovorin Calcium (Oral)
  • Valacyclovir Hydrochloride (Oral)
  • Prednisone Tab (Oral)
  • Amitriptyline Hcl (Oral)
  • Pentostatin (3 Mg/m 2 Milligram(s)/sq. Meter 4 Mg/m 2 Milligram(s)/sq. Meter)
  • Prograf (2 Mg Milligram(s), 1 Day, Oral)


Abdominal Pain, Haematochezia, Diarrhoea, Nausea, Back Pain (8035842-7)
on Jan 11, 2012 Female from UNITED STATES , 28 years of age, weighting 215.0 lb, was diagnosed with
  • urinary tract infection
and was treated with Bactrim Ds. Directly after, patient experienced the unwanted or unexpected Bactrim side effects: abdominal pain, haematochezia, diarrhoea, nausea, back pain. Bactrim Ds dosage: 6 Tablets.

Pain In Extremity, Myalgia (8031788-9)
on Dec 29, 2011 Male from ITALY , 19 years of age, was treated with Bactrim. Patient felt the following Bactrim side effects: pain in extremity, myalgia. Bactrim dosage: N/A.
Multiple prescriptions taken:
  • Deursil
  • Pantoprazole Sodium
  • Captopril
  • Gammagard Liquid
  • Nexium
  • Medrol
  • Gleevec
Patient was hospitalized.

Rash Morbilliform, Pyrexia (8031332-6)
Patient was taking Bactrim Ds. After Bactrim was administered, patient encountered several Bactrim side effects: rash morbilliform, pyrexia on Dec 29, 2011 from FRANCE Additional patient health information: Male , weighting 158.7 lb, . Bactrim Ds dosage: 1tab Three Times Per Week.
Multiple concurrent drugs taken:
  • Zofran (1unit Cyclic)
  • Prednisone Tab (60mg Per Day)
  • Matulane (200mg Cyclic)
  • Cyclophosphamide
  • Doxorubicin Hcl
  • Etoposide (200mgm2 Cyclic)
  • Bleomycin Sulfate
  • Vincristine
Patient was hospitalized.

Eosinophilia, Arthralgia, Pallor, Electrolyte Depletion, Intertrigo Candida, Hypogammaglobulinaemia, Malaise, Dermatitis Exfoliative, Transaminases Increased (8029927-9)
Adverse event was reported on Jan 05, 2012 by a Male taking Bactrim (Dosage: N/A) . Location: UNITED STATES , child 12 years of age, weighting 235.9 lb, Directly after, patient experienced the unwanted or unexpected Bactrim side effects: eosinophilia, arthralgia, pallor, electrolyte depletion, intertrigo candida, hypogammaglobulinaemia, malaise, dermatitis exfoliative, transaminases increased.
Associated medications used:
  • Penicillin
  • Mycophenolate Mofetil
  • Sodium Chloride (500 Ml, Unk)
  • Cellcept
  • Pamidronate Disodium (Unk Unk, Q2mo)
  • Gabapentin
  • Viactiv /00751501/
  • Nplate (485 Mug, Qwk)


Retching, Pharyngitis, Pallor, Dysphagia, Bronchial Secretion Retention, Pyrexia, Weight Decreased, Sleep Apnoea Syndrome, Infantile Spitting Up (8022227-2)
on Dec 23, 2011 Male from UNITED STATES , weighting 16.81 lb, was treated with Bactrim. Patient felt the following Bactrim side effects: retching, pharyngitis, pallor, dysphagia, bronchial secretion retention, pyrexia, weight decreased, sleep apnoea syndrome, infantile spitting up. Bactrim dosage: N/A.
Multiple prescriptions taken:
  • Esomeprazole Sodium
  • Domperidone Maleate
  • Ferrofumarate
  • Synagis
  • Xylometazoline
  • Synagis
Patient was hospitalized.

Toxic Epidermal Necrolysis, Stevens-johnson Syndrome (8021536-0)
on Dec 30, 2011 Male from UNITED STATES , 28 years of age, was diagnosed with
  • antifungal prophylaxis
and was treated with Bactrim. After Bactrim was administered, patient encountered several Bactrim side effects: toxic epidermal necrolysis, stevens-johnson syndrome. Bactrim dosage: N/A. Patient was hospitalized.

Urinary Tract Infection, International Normalised Ratio Increased, Blood Urea Increased, Blood Creatinine Increased, Asthenia (8017567-7)
Patient was taking Bactrim. Directly after, patient experienced the unwanted or unexpected Bactrim side effects: urinary tract infection, international normalised ratio increased, blood urea increased, blood creatinine increased, asthenia on Dec 29, 2011 from UNITED STATES Additional patient health information: Female , 83 years of age, weighting 135.6 lb, was diagnosed with
  • urinary tract infection
and. Bactrim dosage: Po.
Associated medications used:
  • Spiriva
  • I Caps
  • Crestor
  • Combivent
  • Aspirin
  • Coumadin (4mg/3mg Odd Days/even Days Po Chronic)
  • Fosamax
Patient was hospitalized.

Oedema Peripheral, Rash Erythematous, Pruritus (8016250-1)
Adverse event was reported on Dec 28, 2011 by a Female taking Bactrim Ds (Dosage: 1 (800/160) Bid Po) was diagnosed with
  • urinary tract infection
and. Location: UNITED STATES , weighting 140.0 lb, Patient felt the following Bactrim side effects: oedema peripheral, rash erythematous, pruritus. Patient was hospitalized.

Upper Respiratory Tract Infection, Increased Bronchial Secretion, Asthma, Nasopharyngitis, Vomiting, Pyrexia (8014611-8)
on Dec 19, 2011 Male from UNITED STATES , weighting 13.21 lb, was treated with Bactrim. After Bactrim was administered, patient encountered several Bactrim side effects: upper respiratory tract infection, increased bronchial secretion, asthma, nasopharyngitis, vomiting, pyrexia. Bactrim dosage: N/A.
Multiple concurrent drugs taken:
  • Domperidone
  • Omeprazole
  • Synagis
  • Synagis
  • Atrovent
Patient was hospitalized.

Supraventricular Tachycardia, Cardiac Failure Congestive, Dialysis, Sepsis (8013234-4)
on Dec 29, 2011 Male from UNITED STATES , 38 years of age, weighting 238.0 lb, was diagnosed with
  • antifungal prophylaxis
  • hiv infection
and was treated with Bactrim Ds. Directly after, patient experienced the unwanted or unexpected Bactrim side effects: supraventricular tachycardia, cardiac failure congestive, dialysis, sepsis. Bactrim Ds dosage: 1 Tablet.
Associated medications used:
  • Complera (1 Tablet)


  Showing 126-150 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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