sulfamethoxazole and trimethoprim (cont.)
What happens if I miss a dose?
Take the missed dose as soon as you remember. Skip the missed dose if it is almost time for your next scheduled dose. Do not take extra medicine to make up the missed dose.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
Overdose symptoms may include severe forms of some of the side effects listed in this medication guide.
What should I avoid while taking sulfamethoxazole and trimethoprim?
Antibiotic medicines can cause diarrhea, which may be a sign of a new infection. If you have diarrhea that is watery or bloody, stop taking this medication and call your doctor. Do not use anti-diarrhea medicine unless your doctor tells you to.
Avoid exposure to sunlight or tanning beds. This medication can make you sunburn more easily. Wear protective clothing and use sunscreen (SPF 30 or higher) when you are outdoors.
What other drugs will affect sulfamethoxazole and trimethoprim?
Tell your doctor about all other medications you use, especially:
- an antidepressant;
- a blood thinner such as warfarin (Coumadin, Jantoven);
- cyclosporine (Gengraf, Neoral, Sandimmune);
- oral diabetes medication;
- digoxin (Lanoxin, Lanoxicaps);
- a diuretic (water pill);
- indomethacin (Indocin);
- leucovorin, calcium folinate;
- methotrexate (Trexall, Rheumatrex);
- heart or blood pressure medication such as benazepril (Lotensin), captopril (Capoten), fosinopril (Monopril), enalapril (Vasotec), lisinopril (Prinivil, Zestril), moexipril (Univasc), perindopril (Aceon), quinapril (Accupril), ramipril (Altace), or trandolapril (Mavik).
- seizure medication such as phenytoin (Dilantin);
This list is not complete and other drugs may interact with sulfamethoxazole and trimethoprim. Tell your doctor about all medications you use. This includes prescription, over-the-counter, vitamin, and herbal products. Do not start a new medication without telling your doctor.
Where can I get more information?
Your pharmacist can provide more information about sulfamethoxazole and trimethoprim.
Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
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