Cempes

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Medically reviewed

Laura Arias

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Cempes

Property Description
Active ingredient Cefdinir
Form Capsule, Oral suspension (liquid form)
Pharmacological class Third-generation cephalosporin antibiotic
Common use Systemic treatment of bacterial infections
Origin Semisynthetic

What Type of Medicine is Cempes and What is its Composition?

Cempes is a prescription-only medication whose active ingredient is Cefdinir, a semisynthetic compound classified as a third-generation cephalosporin antibiotic. This medicinal entity is a single-ingredient product designed specifically for systemic use. Cefdinir is derived chemically from natural sources, making it semisynthetic, and it is structurally part of the broader beta-lactam antibiotic family. Cefdinir's structural features support its classification as an expanded-spectrum cephalosporin. This classification affirms that the medicine is a systemic agent against bacterial pathogens. Cempes is supplied for oral administration in two primary dosage forms: a solid capsule and a liquid form, known as an oral suspension.


What is the General Purpose of This Class of Antibiotic?

The general purpose of Cempes is to act as a potent bactericidal agent, directly eliminating the susceptible bacteria that cause various infections. Cefdinir achieves its therapeutic effect by disrupting the essential survival mechanism of the invading bacteria. It works by targeting and inhibiting the cell wall synthesis, a critical structural process in bacterial life. As a third-generation cephalosporin, Cefdinir's mechanism of action involves the inhibition of bacterial cell wall synthesis, which defines its direct killing effect on microorganisms. The extended spectrum and broad-spectrum capability of this antibiotic make it suitable for treating typical bacterial infections, such as those affecting the respiratory tract or skin, by combating a wider range of Gram-positive and Gram-negative organisms compared to earlier-generation antibiotics. The development of the oral suspension form specifically caters to pediatric patients, ensuring that effective antibiotic therapy is accessible to children.

Regulatory References

  1. NIH DailyMed
  2. Cefdinir Drug Information

What side effects are possible with Cempes?

Possible Side Effects and Safety Information

The safety profile for Cempes (Cefdinir), a third-generation cephalosporin, is defined by adverse reactions documented in clinical trials and postmarketing surveillance, as published by regulatory authorities like the FDA and NIH.


Common and Systemic Reactions

The most frequently reported adverse reactions are primarily related to the Gastrointestinal system.

Classification Representative Reactions System-Organ Class
Common (1% Incidence) Diarrhea (most frequent), Vaginal moniliasis, Nausea, Headache, Abdominal pain, Vaginitis. Gastrointestinal, Infections/Infestations, Nervous System
Uncommon (< 1% Incidence) Rash, Vomiting, Dyspepsia, Flatulence, Dizziness, Insomnia, Pruritus. Gastrointestinal, Dermatological, Nervous System

Serious Safety Considerations

Official labeling documents a risk of Clostridium difficile Associated Diarrhea (CDAD), which can range in severity and may occur even up to two months after treatment has concluded. Rare, severe events reported postmarketing include life-threatening Hypersensitivity reactions, and serious skin conditions like Stevens-Johnson Syndrome. Additionally, caution is advised for patients with a known allergy to the cephalosporin class of antibiotics due to the documented risk of cross-hypersensitivity with penicillins.


Population and Administration Notes

Systemic exposure to Cefdinir is substantially increased in individuals with impaired renal function and older adults due to reduced drug clearance. Furthermore, co-administration with iron supplements may result in the non-harmful but distinct appearance of reddish stools due to the formation of a nonabsorbable complex.

Overdose and Emergency Response

The official regulatory documents for Cempes (Cefdinir) describe the overdose profile primarily through its documented toxic manifestations and the necessary emergency actions. An overdose situation may present with symptoms affecting the gastrointestinal system, including nausea, vomiting, diarrhea, and stomach pain. Furthermore, serious toxic reactions can involve the central nervous system, leading to the manifestation of seizures or convulsions, which are documented risks associated with high systemic concentrations of beta-lactam antibiotics.

Immediate medical intervention is required if an overdose is suspected. Government guidance strongly mandates that individuals seek emergency services right away—by calling 911 or the local emergency number—if the affected person has collapsed, is experiencing a seizure, or is otherwise unresponsive. Contacting the poison control helpline for immediate consultation is also a required step.

Management of a Cefdinir overdose focuses on providing necessary symptomatic and supportive treatment, as the regulatory information confirms there is no specific antidote known. In cases of serious toxic reaction, especially when compromised renal function is a factor, hemodialysis is officially documented as a procedure that can effectively remove Cefdinir from the body. These statements collectively define the required help-seeking conditions and procedural considerations for Cefdinir overdosage.

Therapeutic Uses of Cempes

What Cempes Treats: Main Uses and Benefits

Cempes is commonly used across therapeutic domains that involve symptoms related to systemic imbalance, in situations involving certain distressing symptoms. The medication is generally applied in settings where short-term symptomatic assistance is needed for conditions of the respiratory system, throat, ears, and skin. This therapeutic approach supports the patient during difficult episodes by easing distress and contributing to improved comfort during periods of heightened symptoms like sore throat and coughing.

This medication is relevant in conditions characterized by periods of heightened symptoms, including acute otitis media, sinusitis, streptococcal pharyngitis, tonsillitis, acute exacerbations of chronic bronchitis, and uncomplicated skin infections.

“The intent of use may assist with symptom stabilization, providing supportive relief when symptoms interfere with routine activities.”

The medication is applied in scenarios where additional management of discomfort is required, such as during seasonal acute flare-ups or when respiratory symptoms create noticeable physiological strain.


Quick Fact: Therapeutic Focus

Cempes helps address symptom clusters that may appear suddenly, focusing on both the localized pain (e.g., ear or throat discomfort) and systemic signs (e.g., fever) associated with acute or episodic changes.

Regulatory References

  1. NIH MedlinePlus Cefdinir overview

Eligibility and Restrictions for Use

Cempes (Cefdinir) use is strictly governed by population-specific rules found in official regulatory documents. Eligibility is defined primarily by allergic history, age, and renal function.

Populations Who Cannot Use Cempes

Use of Cempes is absolutely contraindicated for patients with a known history of hypersensitivity to Cefdinir, other cephalosporins, or penicillin-class antibiotics (due to the documented risk of cross-hypersensitivity).

Age-Related Eligibility

  • Approved Use: The medicine is approved for Adults, Adolescents, and Pediatric patients from 6 months through 12 years of age.
  • Use Not Established: Safety and effectiveness have not been established by regulatory authorities for infants younger than 6 months.

Conditional Use and Restrictions

Condition Eligibility Rule (Official Labeling)
Markedly Compromised Renal Function Use is permitted, but requires a reduction in the total daily dose (Creatinine Clearance < 30 mL/min).
Hemodialysis Use is permitted, but requires specific dosage adjustments and monitoring.
Hepatic Impairment No dosage adjustment is expected to be required, as the drug is mainly eliminated by the kidneys.
Pregnancy Classified as FDA Pregnancy Category B. Use is conditional and reserved for situations where the need is clearly established.
Lactation Cefdinir is not detected in human breast milk following a single 600 mg dose, suggesting acceptability.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The official interaction profile for Cempes (Cefdinir) is primarily defined by significant pharmacokinetic effects that alter drug exposure and mandatory timing rules. No medicinal products are formally classified as contraindicated combinations based on drug-drug interaction risk in regulatory labeling.


Pharmacokinetic and Timing Restrictions

Co-administration with metal-containing antacids (aluminum or magnesium) reduces Cefdinir absorption by approximately 40%. Similarly, therapeutic iron supplements and multivitamins containing iron can reduce absorption by up to 80%. To counteract these reductions, the regulatory labeling mandates a timing-separation requirement: these products must be administered at least two hours before or two hours after Cefdinir. The formation of a nonabsorbable complex with iron may also cause reddish-colored stools. Separately, iron-fortified infant formula has no significant effect on Cefdinir pharmacokinetics.

Exposure Increase and Pharmacodynamic Effects

The co-administration of Probenecid results in a pharmacokinetic interaction where it inhibits the renal excretion of Cefdinir. This inhibition leads to an approximate doubling of the Cefdinir plasma exposure (AUC). A pharmacodynamic interaction is noted with Warfarin, where co-administration has been associated with an increased risk of bleeding. Furthermore, Cefdinir may cause laboratory interference, potentially leading to false-positive results when testing for glucose and ketones in the urine using non-enzymatic methods.

Mechanism of Action

Targeted Inhibition of Penicillin-Binding Proteins

Cempes' active ingredient, Cefdinir, exerts its action by directly targeting structures within the bacterial cell. It functions as an irreversible covalent inhibitor of Penicillin-Binding Proteins (PBPs), which are bacterial enzymes required for cell construction. This inhibition immediately blocks the essential peptidoglycan cross-linking pathway, which stops the progression of the bacterial structural synthesis process.


Disruption of Bacterial Structural Integrity

By halting the proper assembly of the peptidoglycan layer, the drug modifies the molecular steps necessary for structural integrity within the microorganism. This leads to the formation of a critically weakened cell wall that cannot withstand the high internal pressure of the bacterium. This action results in the rapid manifestation of a bactericidal effect, causing the bacterial cell to rupture (lysis), which constitutes the drug's bactericidal action.


Limitation by Counter-Mechanisms

The drug's action is limited by bacterial resistance factors, which counteract the mechanism. These factors include the production of β-lactamase enzymes that chemically inactivate Cefdinir and the presence of altered PBPs with reduced drug affinity. These counter-mechanisms restrict the ability to induce cell lysis. This determines the biological conditions under which the drug's mechanism is functionally relevant.

Dosage and Administration Information

Cempes is approved for use exclusively via the oral route, supplied as either a capsule or a liquid oral suspension. The administration protocol is structured around delivering a standard total daily dose that may be taken in a single or divided pattern. For adults and adolescents (age geq 13), the total daily dose is typically 600 mg, which can be administered as 300 mg twice daily (every 12 hours) or as a single 600 mg dose once daily, depending on the specific condition being addressed. The standard course duration for treatment generally ranges from 5 to 10 days.

The liquid Oral Suspension formulation is primarily used for pediatric patients aged 6 months to 12 years. Dosing for this age group is determined based on weight, typically 14 mg/kg per day (not to exceed 600 mg total daily), administered on either a once or twice-daily schedule. To ensure proper administration, the oral suspension must be shaken well before measuring each dose and is only viable for 10 days after reconstitution.

Cempes may be taken without regard to meal timing. However, to prevent significantly reduced absorption, the instructions require a strict temporal separation: the medicine must be taken at least two hours before or two hours after ingesting aluminum- or magnesium-containing antacids or therapeutic iron supplements. Furthermore, dosage adjustments are mandatory for patients with significantly compromised kidney function (Creatinine Clearance < 30 mL/min); in these scenarios, the total daily dose is reduced.

Recent Clinical Evidence

Research Evidence: Overview of Studies for Cempes (Cefdinir)

Evidence for Use in Common Respiratory and Ear Infections

Research has was studied for several common conditions, including acute otitis media (ear infections), pharyngitis/tonsillitis (throat infections), and acute bacterial sinusitis. The evidence base for these uses primarily comes from short-term Randomized Controlled Trials (RCTs). These trials were designed to monitor how symptoms evolved and to examine clinical success rates with comparator groups.

In studies of acute otitis media, research was evaluated in pediatric populations (children 6 months). The research describes patterns in how patient-reported outcomes evolved and how overall symptom changes were measured within a short follow-up period after the treatment. However, long-term effects are not fully established across these indications. For the specific infections studied, the evidence largely describes short-term changes and outcomes linked to the specific bacteria studied.


Evidence for Use in Bronchial and Skin Infections

Acute exacerbations of chronic bronchitis (AECB) was studied for numerous RCTs involving adults and adolescents with mild-to-moderate episodes. The research examined outcomes linked to inflammatory or irritative states and monitored outcomes reflecting systemic or functional imbalance. Findings describe the measurement of how symptoms evolved during the study period with comparator groups.

For uncomplicated skin and skin structure infections, studies explored the medicine's use in mild-to-moderate episodes. The research describes patterns observed in the studies and how patients reported their experience during the short, typical 10-day treatment duration. In both areas, follow-up durations were limited, meaning there is limited information for long-term outcomes.


What Is Still Uncertain About Cempes Research

The research landscape highlights several areas where certainty remains low. Subgroup findings are uncertain, meaning data for certain groups remain insufficient—such as those with coexisting severe conditions. Comparative evidence is lacking for using this medicine as a single treatment for complicated infections, as research is often limited to its evaluation in the context of an oral step-down therapy.

Key Studies & References

  1. Cefdinir (Oral Route) - Overview of Uses and Efficacy
  2. Therapeutic Guidelines for Acute Otitis Media in Children
  3. Efficacy of Cefdinir in the treatment of acute exacerbations of chronic bronchitis (AECB): A randomized, controlled trial
  4. Comparative study of Cefdinir versus Cefaclor in the treatment of uncomplicated skin and skin structure infections

Frequently Asked Questions (FAQ)

Common questions about Cempes (FAQ)

Q: How quickly should I expect to feel the effects of Cempes?

Studies on Cempes indicate that the highest concentration of the active ingredient typically appears in the bloodstream within 2 to 4 hours after taking a dose. This time reflects when the medicine reaches its highest concentration in the bloodstream. However, the exact time it takes to feel clinical improvement, or for symptoms to begin resolving, may take longer than a few hours.

Q: Will taking Cempes affect my energy levels during the day?

Regulatory documents indicate that Cempes may be associated with side effects that could potentially affect energy levels. These include uncommon side effects like dizziness and insomnia, as well as reports of unusual tiredness or weakness noted in post-marketing surveillance. Such changes can be discussed with a healthcare professional.

Q: Can Cempes cause weight gain or weight loss?

Although not listed among the most common side effects from clinical trials, official post-marketing reports for the active ingredient have included instances of both unusual weight loss and weight gain. These observations can be brought to the attention of a healthcare professional if they are unexpected or significant.

Q: Can I take Cempes if I'm already taking a daily multivitamin?

Yes, but temporal separation is required if the multivitamin contains iron. Iron-containing products can significantly reduce the absorption of Cempes. Official instructions indicate that the medicine should be taken at least two hours before or two hours after ingesting the multivitamin to prevent this reduction in absorption.

Q: What happens if I miss a dose of Cempes?

Official patient information generally instructs that the missed dose be taken as soon as it is remembered. However, if it is almost time for the next scheduled dose, the missed one should be skipped entirely, and the regular schedule continued. It is generally advised not to take a double dose to make up for the missed one.

Q: Do I need to take Cempes with food, or can I take it on an empty stomach?

According to the official prescribing information, Cempes may be taken without regard to food, which means it can be taken either with a meal or on an empty stomach. Note that the liquid oral suspension may have slightly reduced absorption when taken with food.

Q: Why do some people say Cempes caused them stomach upset?

The most frequently reported adverse reactions linked to Cempes are related to the gastrointestinal system. These include common side effects such as diarrhea, nausea, and abdominal pain, as well as uncommon reports of vomiting and indigestion (dyspepsia). These effects are commonly observed with many antibiotics.

Q: What kind of research has been done on the long-term effects of Cempes?

The clinical trials conducted to obtain regulatory approval for Cempes were primarily short-term studies, typically lasting for the duration of the 5- to 10-day treatment course. While these studies focused on the immediate clinical success of treating infections, official documents note that there is limited available information regarding the medicine's long-term outcomes and effects.

Q: How long does Cempes stay in your system after stopping it?

The mean elimination half-life of the active ingredient in subjects with normal kidney function is approximately 1.7 hours. The body primarily eliminates the medicine through the kidneys.

Q: Is Cempes available as a generic medication?

Yes, the active ingredient in Cempes, Cefdinir, is available as a generic medication from several manufacturers. It is also sold under the brand name Omnicef.

Q: Does Cempes have any known psychological side effects, like mood changes?

While mood changes are not commonly listed, adverse reactions affecting the nervous system, such as dizziness and insomnia, have been reported. Rare central nervous system side effects have also been reported with the cephalosporin class of antibiotics, particularly in patients with kidney impairment. Any such changes can be discussed with a healthcare professional.

Q: What should I do if the side effects from Cempes don't go away?

Official patient information suggests consulting with a healthcare professional if any side effects, including common ones like diarrhea or headache, are severe or do not improve after the initial days of treatment. This allows for an appropriate assessment of the ongoing side effect.

Q: Will Cempes affect the effectiveness of birth control pills?

Some antibiotics, including Cempes, may potentially reduce the effectiveness of hormonal contraceptives, such as birth control pills that contain ethinyl estradiol. Consultation with a healthcare provider is suggested to determine if modifications to the contraceptive method may be recommended while the medicine is being taken.

Q: Can Cempes be crushed or split if it's a tablet?

Cempes is supplied as a capsule and a liquid oral suspension. The official labeling does not contain instructions for altering the capsule form, which should typically be swallowed whole. Manipulation of the medicine, such as crushing or splitting, should only be done if directed by a healthcare professional.

Q: What happens if Cempes is accidentally exposed to heat or moisture?

Official storage guidelines require that the oral suspension form must be kept at a controlled room temperature, away from excessive moisture and heat. The prepared liquid suspension also has a limited shelf life and must be discarded after 10 days of reconstitution.

Q: Are there different brand names for the same Cempes medication?

Yes, the active ingredient, Cefdinir, is sold under the brand name Omnicef. The medication is also widely available as a generic product.

Q: Does Cempes require regular blood tests or monitoring?

Regular monitoring may be required specifically for patients with severely impaired kidney function, as the drug's clearance is reduced in this population. It is also important to note that Cempes can interfere with certain laboratory tests, potentially causing false-positive results when testing for glucose and ketones in the urine using non-enzymatic methods.

Q: Is Cempes safe to take while breastfeeding?

Regulatory documents indicate that the active ingredient, Cefdinir, has not been detected in human breast milk after a single 600 mg dose. Consultation with a healthcare provider is suggested before use during breastfeeding.

Q: If I feel better, should I still continue taking Cempes as prescribed?

Yes, it is generally recommended to complete the full course of treatment exactly as prescribed, even if symptoms begin to improve or go away entirely. This is essential to prevent the infection from being completely cleared and may help reduce the risk of the bacteria developing resistance to the antibiotic.

Q: Are there any warning signs that an allergic reaction to Cempes is starting?

Cempes is associated with a risk of serious hypersensitivity reactions. Warning signs of an allergic reaction may include developing a rash, experiencing itching or swelling (especially of the face, tongue, or throat), or severe dizziness. Immediate medical attention is necessary if a serious reaction is suspected.

Q: Why does the packaging for Cempes have a special warning label?

Official packaging includes specific warnings due to the potential for serious safety issues. These considerations include the risk of developing Clostridium difficile Associated Diarrhea (CDAD), which can occur even after treatment is finished, and the risk of severe hypersensitivity reactions.

Q: Is Cempes known to cause any long-term joint or muscle issues?

While not among the common side effects from clinical trials, reports of joint or muscle pain have been noted in post-marketing surveillance. Since the clinical trials were short-term, there is limited information on any potential long-term musculoskeletal effects.

Q: Can I drive or operate machinery safely while taking Cempes?

Dizziness is listed as an uncommon side effect of Cempes. Because of this potential central nervous system effect, patients who experience dizziness should exercise caution when driving or operating heavy machinery.

Q: What are the signs that Cempes is not working effectively?

A sign that Cempes may not be working effectively is if the symptoms of the infection do not improve or begin to worsen during the first few days of treatment. A healthcare professional should be contacted in this instance.

How should Cempes be stored and disposed of?

How to Store and Dispose of Cempes?

Specific storage conditions for Cempes are determined by its manufacturer and are based on regulatory stability testing (e.g., FDA, EMA). Always refer to the drug’s official labeling, patient information leaflet, or the pharmacist for the precise, labeled requirements, including the necessary temperature range (e.g., refrigerated or controlled room temperature), protection from light or moisture, and any in-use stability period after opening or reconstitution.

Disposal Guidelines

If the Cempes label or patient information does not contain specific flushing instructions, the medication should generally be disposed of through a drug take-back program or a mail-back envelope, as these are the preferred methods. If these options are not available, you can dispose of the medication in your household trash. To do this, mix the drug with an unappealing substance like used coffee grounds or cat litter, seal the mixture in a plastic bag, and then discard it. Always scratch out all personal information from the prescription label before disposal.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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