April 28, 2017
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Bactrim

"(Reuters) - A baby born with brain damage at a hospital in Oahu, Hawaii, was infected by the Zika virus, U.S. health officials confirmed on Saturday, apparently the first case of the mosquito-borne virus in a birth on U.S. soil.

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Bactrim

BACTRIM
(sulfamethoxazole and trimethoprim) Injection, for Intravenous Infusion




DRUG DESCRIPTION

BACTRIM™ (trimethoprim and sulfamethoxazole) injection, a sterile solution for intravenous infusion only, is a combination of sulfamethoxazole, a sulfonamide antimicrobial, and trimethoprim, a dihydrofolate reductase inhibitor antibacterial. Each 5 mL contains 80 mg trimethoprim (16 mg/mL) and 400 mg sulfamethoxazole (80 mg/mL) compounded with 40% propylene glycol, 10% ethyl alcohol and 0.3% diethanolamine; 1% benzyl alcohol and 0.1% sodium metabisulfite added as preservatives, water for injection, and pH adjusted to approximately 10 with sodium hydroxide.

Trimethoprim is 2,4-diamino-5-(3,4,5-trimethoxybenzyl)pyrimidine. It is a white to light yellow, odorless, bitter compound with a molecular weight of 290.3 and the following structural formula:

Ttrimethoprim - Structural Formula Illustration 1

C14H18N4O3     M.W. 290.3

Sulfamethoxazole is N1-(5-methyl-3-isoxazolyl) sulfanilamide. It is an almost white, odorless, tasteless compound with a molecular weight of 253.28 and the following structural formula:

Sulfamethoxazole - Structural Formula Illustration 2

C10H11N3O3S     M.W. 253.28

What are the possible side effects of sulfamethoxazole and trimethoprim?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have a serious side effect such as:

  • diarrhea that is watery or bloody;
  • fever, chills, swollen glands, body aches, flu symptoms, sores in your mouth and throat;
  • new or worsening cough;
  • pale skin, feeling light-headed, rapid heart rate, trouble concentrating;
  • easy bruising, unusual bleeding (nose, mouth, vagina, or rectum), purple or red...

Read All Potential Side Effects and See Pictures of Bactrim »

What are the precautions when taking trimethoprim and sulfamethoxazole (Bactrim)?

Before taking sulfamethoxazole with trimethoprim, tell your doctor or pharmacist if you are allergic to sulfa medications or trimethoprim; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: kidney disease, liver disease, certain blood disorders (such as porphyria, anemia due to folate vitamin deficiency), history of blood disorders caused by trimethoprim or sulfa medications, vitamin deficiency (folate or folic acid), severe allergies, asthma, decreased bone marrow function (bone marrow suppression), a certain metabolic disorder (G6PD deficiency),...

Read All Potential Precautions of Bactrim »

Last reviewed on RxList: 3/16/2017
This monograph has been modified to include the generic and brand name in many instances.

Bactrim - User Reviews

Bactrim User Reviews

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Here is a collection of user reviews for the medication Bactrim sorted by most helpful. Patient Discussions FAQs

Report Problems to the Food and Drug Administration

 

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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