Antibiotics for UTI (Urinary Tract Infection): Description of UTI, Causes, and Treatments

antibiotics for uti in men

Urinary Tract Infections (UTI) usually occur in the bladder. Such health issues sometimes disappear on their own.

Description of UTI

Symptoms include painful urination, a need to urinate frequently, dull pain in the pelvic area, and cloudy urine (which may have an unusually nasty smell). There can also be blood in the urine.

Other diseases can give similar symptoms, so always consult a physician if the symptoms don’t clear up quickly. Infections in the bladder can give rise to kidney infections.

These are more severe and can cause complications in pregnancy. The symptoms of kidney infections are nausea (sometimes with vomiting), and pain in the back and sides.

UTIs can remain unnoticed in babies and toddlers, or in people with dementia.


Bacteria, usually originating in the gut, are the primary cause of urinary tract infections (UTIs).

These infections are more common in women than men. UTIs may be picked up in hospital, often when a catheter gets used for urination.

Risk factors for women include using spermicide and diaphragm contraceptives; some women tend to get infections after sexual intercourse.

Men are more at risk if they have prostate conditions. Infections in the bladder are more common than those in the kidneys. The disease may spread from the bladder to other organs.


Antibiotics are the primary treatment for UTIs. Many medicines have become ineffective due to bacterial resistance, so it’s entirely possible that the initial antibiotic prescribed won’t work. Doctors will try another way if that’s the case.

Trimethoprim/sulfamethoxazole is a combination antibiotic, often used for urinary tract infections.

Some people refer to it as co-trimoxazole. Common side-effects include slight fever, nausea, a rash, and diarrhea.

Amoxicillin / Clavulanic Acid is an antibiotic used to treat urinary tract infections. Amoxicillin is a β-lactam antibiotic.

Since bacteria are often resistant to such antibiotics, clavulanic acid gets used in combination with amoxicillin to reduce the resistance. Possible side-effects include diarrhea, vomiting, nausea, and a skin rash.

Nitrofurantoin is a commonly-used antibiotic for urinary infections. It works against bacteria that are resistant to conventional β-lactam antibiotics. Common side-effects include diarrhea, nausea, and dizziness.

It tends to make the urine darker, but this effect is harmless, so no need to panic. Patients should not take them in cases of severe kidney disease.

Ciprofloxacin is a fluoroquinolone antibiotic, sometimes used to treat urinary tract infections. Common side-effects include nausea and diarrhea.

The drug increases the risk of tendon problems, including tendon rupture, particularly in elderly patients. Patients who suffer from the disease myasthenia gravis should not use them.

Norfloxacin is another fluoroquinolone antibiotic, similar to ciprofloxacin. In fact, it has identical side-effects to ciprofloxacin.

It also increases the risk of tendon problems and should not be used by those suffering from myasthenia gravis.

Methenamine doesn’t work in the same manner as conventional antibiotics but undergoes chemical decomposition in the bladder to give formaldehyde, which eliminates the bacteria.

Resistance does not take place. However, this medication only works when the urine is acidic. Since not everybody has sufficiently acidic urine, methenamine is not always effective.

Patients should not take Methenamine along with compounds such as ammonium chloride or ascorbic acid (vitamin C), which are supposed to decrease the pH of the urine (make it more acidic). There is some doubt as to the efficiency of these acidifying agents.

Urine infections or cystitis are a common pathology, especially in women. In fact, medical experts estimated that about 60 percent of women have a urinary tract infection at some point in their life.

Experts recommend going to the doctor if a person presents symptoms that suggest a urinary infection.

“The treatment of choice for urine infections in antibiotics. It is essential that before choosing the medication to get a urine culture that identifies the microorganism causing the disease.

According to José María Rodríguez Fernández, a specialist in infectious diseases of the Service “The most important are the derivatives of penicillins, cephalosporins, fluoroquinolones or fosfomycin, although there are many more.”

The expert notes that all medications available to treat urine infection require the doctor to prescribe.

Also, it indicates that to avoid the appearance of resistant microorganisms the correct administration of the antibiotic is essential for the effectiveness of the treatment.

Regarding the efficacy of medicines, Rodríguez Fernández specifies that it is usually high, although it depends on the type of infection and the level of severity.

“For example, a kidney infection often requires administration of intravenous antibiotics to achieve high efficacy. On the other hand, in most cases of acute cystitis in a woman without previous pathology, administration Of a single dose of fosfomycin is very effective,” he explains.

Tips for preventing cystitis.

  • Drink plenty of water throughout the day and take vitamin C as it acidifies urine by preventing the growth of bacteria.
  • Use toilet paper from front to back; Otherwise, the anus bacteria can access the vagina or the urethra.
  • Shower instead of bathing, to avoid contact with dirty water.
  • Carefully clean the genital area after having sex.

Pregnant women do not appear to be more susceptible to urinary tract infections than other women (they only develop urinary tract infections between two and four percent of pregnant women).

But if it is the case, it is easier for the infection to reach the kidneys, because hormonal changes and the position of the urinary tract during pregnancy can facilitate the passage of bacteria.