Rx required in the US, UK, and Canada

Ciprofloxacin

Also called Cipro, Cipro XR. Fluoroquinolone antibiotic.

A reserved antibiotic for infections where safer drugs do not fit. Not a first-line drug for ordinary sinusitis, bronchitis, or uncomplicated UTI.

Last reviewed 2 November 2026. RxNorm 2551. SNOMED CT substance 372840008.

What ciprofloxacin treats

Primary uses clinicians actually reach for this drug for. Local resistance and your own history can take a use off the list.

Some complicated urinary and kidney infections, some abdominal infections, and some other serious infections when safer antibiotics cannot be used.
Specific exposure or resistance situations a specialist or emergency clinician directs.
Not uncomplicated cystitis, uncomplicated sinusitis, or acute bronchitis when another option exists. FDA has said this directly.

Using ciprofloxacin because it is “strong” is not a clinical indication. Broader is not better. It is how tendon injury and resistant bacteria get selected.

What it does not treat

Colds, flu, COVID-19, and bronchitis
Uncomplicated bladder infection when nitrofurantoin or another first-line drug fits
Routine sinusitis
A tooth infection instead of dental care

Forms, dosing examples, and how to take it

Forms

Immediate-release tablets, commonly 250 mg and 500 mg, also 750 mg
Extended-release tablets (Cipro XR), which are not interchangeable with immediate-release
Oral suspension
Ear and eye drops are different products and are not a swallowed dose.

Adult examples

Labeled adult doses depend on the organ, the bacteria, and kidney function. This page does not print a self-start urinary regimen, because current FDA safety advice is to avoid ciprofloxacin for uncomplicated cystitis when another drug can be used.

Educational examples only. Not a dosing instruction for a named patient.
Situation	Example adults may see on a label or guideline	Limit
When an oral fluoroquinolone is actually appropriate	A prescriber chooses a tablet strength, often 250 mg or 500 mg, and a schedule, often twice daily, for a defined number of days	Kidney disease changes that plan. Do not copy someone else’s bottle.
Extended-release ciprofloxacin	Its own once-daily schedule	Do not split XR tablets or substitute them for immediate-release tablets.
Uncomplicated UTI, ordinary sinusitis, ordinary bronchitis	Usually no ciprofloxacin dose	Ask why a safer drug was not chosen if one is prescribed. The answer should be specific.

Food, minerals, and administration

Do not take ciprofloxacin with tizanidine. The combination can be dangerous and is contraindicated.
Separate antacids, iron, calcium, zinc, and dairy-only meals by several hours. A mixed meal is different from a glass of milk used to swallow the tablet. Follow the label.
Caffeine can feel stronger. Limit coffee and energy drinks if you notice pounding heart, anxiety, or insomnia.
Warfarin, theophylline, and some diabetes drugs interact. The pharmacist should see the full list.
Avoid strenuous tendon loading. Stop and get care at the first tendon pain, pop, numbness, or confusion.

Can an online doctor prescribe ciprofloxacin?

Yes only inside the narrow band below. The same visit is supposed to refuse the drug outside that band.

When a prescription is plausible

A clinician may prescribe it when no safer antibiotic fits and the infection is one they can responsibly treat.
For a routine UTI, sinus infection, or chest cold, a careful telehealth clinician will usually refuse ciprofloxacin and either choose another drug or no antibiotic.

What the visit should cover

Age over 60, steroid use, transplant history, and prior tendon trouble.
Aneurysm, high blood pressure, Marfan syndrome, Ehlers-Danlos syndrome, and other vascular disease.
Myasthenia gravis, seizure history, kidney function, diabetes, and tizanidine.
Whether a first-line drug was already ruled out, and why.

When the clinician should refuse

Uncomplicated cystitis in a patient who can take nitrofurantoin or another recommended drug.
Viral bronchitis or ordinary sinusitis.
A patient on tizanidine, or with myasthenia gravis.
Someone asking for ciprofloxacin by name because a website called it a strong antibiotic.

How same-day e-prescriptions and local pickup work. If the drug is prescribed, use a pharmacy you can reach today. Mail order is the wrong speed for an acute infection.

Side effects, allergies, pregnancy, and alcohol

Often mild

Nausea
Diarrhea
Dizziness
A jittery feeling if caffeine intake stays high

Get care

Tendon pain, swelling, or rupture, during treatment or months later
Burning, numbness, or weakness that can become permanent
Confusion, agitation, or a seizure
Sudden severe chest, back, or abdominal pain
Very high or very low blood sugar
Severe diarrhea from C. difficile

Allergies and cross-reaction

A fluoroquinolone allergy includes ciprofloxacin and may cross to levofloxacin. It is unrelated to penicillin. Do not “step up” to ciprofloxacin because of a penicillin allergy unless a clinician decides no other class will work.

Pregnancy

Ciprofloxacin is generally avoided in pregnancy. A specialist may use it for a serious infection with no safer option. It is not a telehealth default.

Alcohol

There is no disulfiram-style warning. Alcohol adds dizziness and poor judgment about tendon pain. Skip it. The more important everyday interaction for many people is caffeine.

Severe watery diarrhea during or after any antibiotic can be C. difficile. Mouth or throat swelling is an emergency: call 911 or 999.

Generic, coupon, and telehealth pickup

These are budgeting bands for a common U.S. generic fill, not a national average and not a GoodRx quote. Discount-card prices change by pharmacy and ZIP code, and a card usually cannot be combined with insurance on the same fill. A telehealth visit is a separate bill, often advertised around $29 to $129 in late October 2026. The medicine is extra. Ask the pharmacy for today’s cash price and today’s coupon price before you travel.

Average-style planning bands for budgeting. Confirm the live cash price and the live coupon.
Product	U.S. cash planning band	Discount-card band, GoodRx-type	Telehealth plus local pickup
Generic ciprofloxacin 500 mg, a short course of about 14 tablets	Often about $15–$40	Often about $8–$25	A low price is not a reason to choose it over a safer drug.
Brand Cipro or Cipro XR	Usually much higher	Coupons rarely justify the brand	XR is a different product from the immediate-release tablet.

Questions about ciprofloxacin

Can an online doctor prescribe ciprofloxacin for a UTI?

Often they should not. FDA advises against fluoroquinolones for uncomplicated bladder infections when another antibiotic can be used. Nitrofurantoin is a usual first-line drug for the right patient. Ciprofloxacin still has uses in complicated or kidney infections, which are usually in-person problems.

What is the boxed warning?

Tendon rupture, nerve damage that can be permanent, central-nervous-system effects, and worsening of myasthenia gravis. There is also a warning for tears in the aorta. Sudden severe chest, back, or belly pain is an emergency.

Can I take Cipro with milk or coffee?

Do not swallow it with a glass of milk or with calcium antacids. Separate those by several hours. Coffee is not forbidden, but caffeine can feel much stronger.

What if my tendon hurts?

Stop ciprofloxacin and get care the same day. Do not exercise through it, and do not replace the drug with a leftover antibiotic. Call 911 for sudden severe chest, back, or abdominal pain.

What should I do if I miss a dose?

Take a missed dose when you remember unless it is close to the next dose. Skip it then. Do not take two doses at once. If you vomit soon after a dose, ask the pharmacist before you repeat it. The label and the pharmacist outrank this sentence.

Labels: DailyMed. Stewardship: CDC. Pharmacy checks: FDA BeSafeRx. Codes were read from RxNav on 2 November 2026 for ingredient RxCUI 2551.