Common Uses

The most common infections treated are for infection in the nose, ear, throat, urinary tract, reproductive system, skin, or respiratory system. Cenmox is not limited to these infections and can also be used to treat things like tooth abscess, blood infections, brain infections, and meningitis.

Dosage and Direction

Dosage of Cenmox varies and is specifically determined by your doctor based on factors about the patient. Such factors include: age, weight, patient health, and patient liver. The dosage may vary based on the severity of the bacterial infection it is being prescribed for. For example, an adult weighing more than 88 pounds, fighting a mild or moderate infection, would be dosed 250 mg twice every 8 hours or 500 mg every 12 hours.

Precautions

Communicate your health history with your medical professional, particularly if you have are currently facing or have faced one of the following health conditions:

• Sore Throat
• Urinary Issues
• Viral fever
• Health problems related to your kidneys
• HIV
• Cancer that affects white blood cells

Additionally, you should discuss with your doctor other medications you might be taking or ingredients contained in Cenmox that you may be allergic to. If you are allergic to penicillin, cephalosporin, or various antibiotics your doctor can prescribe you alternative medications.

If you are pregnant, breastfeeding, or trying to conceive you should not take Cenmox unless your symptoms persist. Work with your doctor to ensure the appropriate safety measures are taken in such an instance.

Cenmox can make you drowsy and should not be taken when operating heavy machinery. Caution is recommended if you are driving after taking Cenmox. Cenmox should not be used in conjunction with alcohol.

Use caution when taking Cenmox for those who are aged as it may cause an increase in accidents.

Contraindications

There are circumstances in which Cenmox should not be used. Such instances include allergies to penicillin or other beta-lactam agents. You should not take Cenmox if you have contracted the Epstein-Barr virus, which is commonly referred to as mononucleosis as this could cause a serious skin rash.

Possible Side Effects

Side effects are common in most prescriptions and are not guaranteed but are shared as a possible effect you may experience while taking the drug. The common side effects of Cenmox are considered mild but may include: Rash, Nausea, Diarrhea, or Vomiting.

If you experience these side effects persistently or if they continue to worsen you should speak with your doctor. It may be necessary to stop using Cenmox.

Cenmox also poses side effects that could occur but are rare. These include: mood changes, black or hairy tongue, dizziness, itching, hives, excessive energy, sleeplessness or restlessness, yeast infection of skin mouth or nails, blood disorders, severe skin reactions, kidney and urinary tract disorders, liver dysfunction, hallucinations, seizures or convulsions, or a decrease in potassium levels.

If you experience any of these side effects, it is recommended that you immediately contact your doctor. Additionally, if you experience any other side effects it may be pertinent to contact your doctor.

Drug Interactions

Not all medicines work well with others and Cenmox may not work well with other medications you might be taking.

Here are some potential drug interactions to be aware of when taking Cenmox:

• Antigout agents
• Anticoagulants taken orally – when mixed with Cenmox you may experience prolonged bleeding
• Oral contraceptives – Cenmox could reduce the effectiveness of your oral contraceptive
• Hormone or Sex Steroids
• Antimetabolite medicines
• Tetracycline’s – may cause Cenmox to be ineffective

Missed Dosage

If you miss a dose, you should not double your dose the next time. Simply proceed with the next dose and make up the missed dose at the end.

Overdose

Taking too much Cenmox could cause your system to experience the effects of an overdose. You may experience nausea, vomiting, diarrhea, or stomach cramps.

Storage

If you are provided an oral liquid of Cenmox it should be stored in the refrigerator and thrown away after 14 days. If you are prescribed Cenmox tablets, store them at room temperature but keep away from excessive heat or moisture. Do not freeze.

Disclaimer
We provide only general information about medications which does not cover all directions, possible drug integrations, or precautions. Information at the site cannot be used for self-treatment and self-diagnosis. Any specific instructions for a particular patient should be agreed with your health care advisor or doctor in charge of the case. We disclaim reliability of this information and mistakes it could contain. We are not responsible for any direct, indirect, special or other indirect damage as a result of any use of the information on this site and also for consequences of self-treatment.

Clinical Verification

Last Clinically Updated: August 15, 2026

Written By

Dr. Elena Vance, PharmD

Clinical Specialist in Neuropharmacology

Fact Checked By

Marcus Thorne, MS

Biomedical Data & FDA Label Verification

Medically Reviewed By

Dr. Arthur Campbell, MD

Board-Certified Psychiatrist (ABPN)