Bactrim Rx Only
Generic: Sulfamethoxazole/Trimethoprim · Sulfonamide + folate synthesis inhibitor
from $0.34
- Prescription required. We do not dispense without a valid U.S. Rx.
- Pickup today in Los Angeles or get local delivery.
- Insurance accepted: Most major plans (Anthem, Cigna, Aetna, UnitedHealthcare).
- Reviewed by licensed pharmacists.
How ordering Bactrim works
- Send us your prescription (upload, prescriber e-faxes, or transfer from another pharmacy).
- We verify your Rx, check interactions, and reach out if anything needs attention.
- Choose pickup or delivery at checkout. Most orders ready the same day.
Important safety information (summary)
Do not use if
- You’ve had a serious allergy to sulfonamides (“sulfa”) or to trimethoprim.
- You have a history of megaloblastic anemia due to folate deficiency.
- Infant under 2 months (risk of kernicterus) or prior severe reaction (e.g., SJS/TEN).
- Past hypersensitivity to Bactrim or clinician advised against it.
Common side effects
Nausea, loss of appetite, rash, headache. Can increase sun sensitivity. Seek urgent care for severe rash, breathing trouble, or facial swelling.
Antibiotic stewardship
Bactrim treats bacterial infections only (not colds/flu). Take exactly as prescribed and drink plenty of water.
This page is informational and not a substitute for medical advice. See full information below.
What is Bactrim?
Bactrim (sulfamethoxazole/trimethoprim) combines a sulfonamide with a folate pathway inhibitor to block sequential steps in bacterial folate synthesis. Available as tablets and oral suspension. Dispensed by Serv-U Pharmacy only with a valid prescription.
Uses
- Urinary tract infections
- Acute otitis media
- Acute exacerbations of chronic bronchitis (bacterial)
- Traveler’s diarrhea due to susceptible strains
- Skin/soft-tissue infections, including certain MRSA (per local guidance)
Only your clinician can determine if Bactrim is appropriate for you.
How it’s taken (follow your prescription)
Take exactly as prescribed, with a full glass of water. If you miss a dose, take it when remembered unless it’s almost time for the next—do not double up.
| Form | Strengths (examples) |
|---|---|
| Tablets | Single Strength 400 mg/80 mg; Double Strength 800 mg/160 mg |
| Oral suspension | 200 mg/40 mg per 5 mL |
Refer to your label for exact dosing. Pharmacist counseling is available at checkout.
Warnings & interactions
- Severe skin reactions: Stop and seek care if rash/blistering occurs (SJS/TEN risk).
- Blood & electrolytes: May cause hyperkalemia; caution with ACE inhibitors/ARBs, spironolactone. Rare blood dyscrasias.
- Renal/hepatic: Dose adjustments may be needed; maintain hydration to reduce crystalluria.
- Pregnancy/Breastfeeding: Discuss risks/benefits with your clinician.
- Interactions: Notable: warfarin (↑ INR/bleeding risk), methotrexate (↑ toxicity), phenytoin (↑ levels), sulfonylureas (↓ glucose), dofetilide (contraindicated).
- Photosensitivity: Use sun protection.
Storage
Store tablets at room temperature away from moisture. Shake suspension well; refrigerate if directed and discard after the labeled number of days.
FAQ
Can I buy Bactrim over the counter? No. In the U.S., Bactrim is prescription-only. Serv-U Pharmacy dispenses it only with a valid Rx.
Does Bactrim increase sun sensitivity? Yes. Protect skin and avoid excessive sun exposure.
Can I take Bactrim with warfarin? This combination can raise INR. Your prescriber may need closer monitoring or an alternative.
What if I have a “sulfa” allergy? Do not use Bactrim. Discuss alternatives with your prescriber.
Sources & review
- FDA Prescribing Information for Sulfamethoxazole and Trimethoprim (latest label)
- CDC: Antibiotic Use and Resistance
- NIH MedlinePlus: Sulfamethoxazole/Trimethoprim
Medically reviewed by Judy Doyle, PharmD — Licensed Pharmacist (NPI 1699814004) · Last updated
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Reviewed by our pharmacist
Judy Doyle, PharmD — Licensed Pharmacist (NPI 1699814004).
Bactrim is often chosen for UTIs and certain skin infections when local resistance patterns support it. I counsel patients to hydrate well, use sun protection, and tell their care team about all meds—especially warfarin or potassium-raising drugs. Any rash that spreads or blisters needs urgent attention. If there’s a sulfa allergy history or the infection is likely viral, we’ll select another option.
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- Secure checkout; clear privacy practices (HIPAA).
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