View trimethoprim information, including dose, uses, side-effects, renal impairment, pregnancy, breast feeding, contra-indications and monitoring requirements.

See the list of drugs that interact with Trimethoprim. Includes information on severity of interaction and the level of evidence for it.

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Cefalexin, co-amoxiclav (if culture susceptible), or trimethoprim (if culture susceptible). If other first line antibacterials are inappropriate, ciprofloxacin may be used.

Nov 27, 2025 · Online access to the BNF (British National Formulary) content within the UK, provided by NICE

Trimethoprim Trimethoprim increases the risk of haematological side-effects (sometimes fatal) when given with Methotrexate. Manufacturer advises avoid. See methotrexate for further …

Sulfamethoxazole and trimethoprim are used in combination (as co-trimoxazole) because of their synergistic activity (the importance of the sulfonamides has decreased as a result of …

Trimethoprim Trimipramine Tropicamide Trospium Tryptophan Tucatinib Typhoid vaccine (live) U Ublituximab Ulipristal Umeclidinium Upadacitinib Urokinase Ursodeoxycholic acid …

Alternative antibacterial options if lymecycline or doxycycline unsuitable: trimethoprim [unlicensed] or a macrolide (such as erythromycin). A Strength of recommendation: High

Pricing and pack information for Oral tablet, Oral suspension and Solution for infusion forms of Co-trimoxazole