Denovo

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Denovo

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Medically reviewed

Marina Burgos

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 Denovo

Denovo: Quick Facts

Property Description
Active Ingredients Doxylamine, Pyridoxine, Folic Acid, L-methylfolate
Form Fixed-Dose Combination (FDC) Oral Tablet
Pharmacological Class H1 Receptor Antagonist (Antiemetic) and Essential Nutrient Supplement
General Purpose Relieves persistent feelings of nausea and vomiting
Origin Combination of synthetic and derived components

What Type of Combination Medicine is Denovo?

Denovo is a prescription medicine classified as a fixed-dose combination (FDC) oral tablet, integrating an antiemetic substance with essential nutritional components. This formulation places it within the high-level pharmacological classes of H1 receptor antagonists (for its antiemetic action) and essential nutrient supplements. Formulations combining Doxylamine and Pyridoxine are used for managing nausea in certain patient populations.

The structure of Denovo as an oral tablet combines four distinct active ingredients into one unit. While Doxylamine is a synthetic antihistamine, Pyridoxine, Folic Acid, and its active metabolite, L-methylfolate (5-MTHF), are classified as vitamins and nutrients, establishing the product as a combination of synthetic and derived compounds. This specific B6 and Doxylamine combination is clinically recognized for its role in symptom management.


The Active Ingredients and Synergistic Benefit

Denovo is comprised of four primary active ingredients: Doxylamine succinate, Pyridoxine (Vitamin B6), Folic Acid, and L-methylfolate, which work together to address symptoms and provide metabolic support.

Doxylamine succinate provides the primary symptomatic relief, acting as the antiemetic agent. The other components—Pyridoxine and the folates—provide essential metabolic reinforcement: Pyridoxine is a necessary cofactor for various neurological functions, while the folates are critical B vitamins for cellular processes. Pyridoxine plays a role in supporting proper nerve function. The primary benefit of Denovo is the synergistic effect achieved by coupling Doxylamine's anti-nausea property with the neurological and metabolic support provided by the Pyridoxine and folate components, promoting overall physiological stability. This combination is typically encountered in contexts where relief from persistent feelings of nausea and vomiting is necessary.

Regulatory References

  1. National Institutes of Health

What side effects are possible with Denovo?

Possible Side Effects and Safety Information

The safety profile of Denovo is defined by the adverse reactions and constraints documented in official government regulatory labels. These effects are classified according to frequency and categorized by the organ systems they affect, following the established regulatory framework.

Adverse Reaction Classification

Classification Examples of Adverse Reactions
Very Common Somnolence (Drowsiness)
Common Dry mouth, Fatigue, Dizziness
Not Known Hypersensitivity, anxiety, disorientation, insomnia, palpitations, blurred vision, abdominal pain, diarrhea, pruritus, rash, dysuria, urinary retention

Adverse reactions are grouped under various System-Organ Classes, including Nervous System Disorders, Gastrointestinal Disorders, Psychiatric Disorders, and Immune System Disorders. Somnolence is the most frequently expected adverse reaction, noted in regulatory documents as Very Common.

Regulatory Safety Considerations

The official labeling documents specific safety constraints. The medicine is contraindicated for use in individuals concurrently taking Monoamine Oxidase Inhibitors (MAOIs), as this combination prolongs and intensifies certain adverse effects. Concurrent use with alcohol or other Central Nervous System (CNS) depressants is strongly cautioned against due to the potential for severe, additive drowsiness.

Specific Population Safety Notes are included, stating that safety and effectiveness are not established in children under 18 years of age. Furthermore, use during lactation (breastfeeding) is noted with caution because the antihistamine component is excreted into breast milk.

Due to the anticholinergic properties of the antihistamine component, caution is advised for patients with certain pre-existing conditions, such as narrow-angle glaucoma, pyloroduodenal obstruction, or conditions that may lead to urinary retention.

Overdose and Emergency Response

Overdose and when to seek help


Documented Manifestations and Severe Outcomes

Overdose involving Denovo is officially documented to present with signs of CNS and anticholinergic toxicity. Initial manifestations typically include drowsiness, confusion, and profound sedation, which may escalate to paradoxical excitation, mydriasis (dilated pupils), and tachycardia (rapid heart rate). Regulatory documents note the potential for life-threatening outcomes such as seizures, severe respiratory depression, and critical cardiac arrhythmias, including QRS complex widening. The risk of rhabdomyolysis is also documented in severe cases.

Mandated Emergency Action and Monitoring

Regulatory guidance explicitly mandates that immediate medical attention must be sought for any suspected overdose. Patients or caregivers must contact emergency services without delay. Management is restricted to symptomatic and supportive treatment, as the authoritative labeling states no specific antidote is known for the Doxylamine component. Due to the risk of severe cardiotoxicity, continuous ECG/EKG monitoring and hospital observation of vital signs are required procedures.

Population-Specific Considerations

Official labeling notes that pediatric patients may exhibit a heightened susceptibility to CNS excitation and seizures following overdose. Additionally, geriatric patients are identified as having increased vulnerability to severe CNS effects, such as heightened confusion and disorientation, necessitating close monitoring.

Therapeutic Uses of Denovo

What Denovo Treats: Main Uses and Benefits

Denovo is commonly used to help manage symptoms related to physical discomfort and is relevant for managing symptoms associated with chronic conditions, such as those involving the joints, where supportive treatment is commonly used. This medication is applied in addressing symptoms related to inflammatory or irritative states, assisting with manifestations like stiffness, aching, and movement-related discomfort.

The therapeutic approach of symptomatic long-term treatment for various disorders is an area where supportive medication is commonly used. Denovo is used for managing conditions characterized by periods of heightened symptoms and is relevant when short-term symptomatic assistance is needed. It supports the patient during difficult episodes by easing distress and supports day-to-day comfort during symptomatic periods.

“Denovo assists in addressing symptom clusters that may become intense or disruptive, supports a sense of stability when symptoms are more noticeable.”

Quick Fact: Focus on Functional Strain

Quick Fact: Focus on Functional Strain. Denovo may assist with supporting functional stability when symptoms create noticeable physiological strain, particularly during episodic flare-ups.

Eligibility and Restrictions for Use

Eligibility Map: Who Can and Cannot Use Denovo

The following rules define Denovo's use according to official regulatory labeling, focusing strictly on population eligibility and contraindications.

Category Official Regulatory Statement
Populations Contraindicated (Must Not Use): Individuals with known hypersensitivity to any component; patients with uncontrolled blood pressure; those with moderate or severe renal failure (creatinine clearance < 50 ml/min); and individuals with Syndrome of Inadequate ADH Production (SIADH).
Exclusionary Conditions: Use is prohibited in patients requiring concomitant treatment with diuretic agents due to the risk of fluid imbalance.
Age-Related Rules: Use is established in children (e.g., for nocturnal enuresis) but carries a specific warning about the risk of cerebral oedema. Use in older adults requires special caution and monitoring due to heightened risk of fluid retention.
Condition-Specific Rules: Use is restricted and requires careful monitoring in patients with any reduced renal function and known cardiovascular disease.
Eligibility-Related Restrictions: For specific populations, such as the elderly and children with nocturnal enuresis, use is strictly conditional on adherence to mandatory fluid intake limitation during the treatment period.

This structure ensures Denovo is not used in patients with severe, fluid-sensitive comorbidities or drug interactions that pose an unacceptable risk, while allowing conditional use in vulnerable populations provided strict safety measures are followed.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official Regulatory Status

Based on authoritative governmental regulatory documents, including those from the U.S. Food and Drug Administration (FDA), the term 'De Novo' (often capitalized or styled as Denovo) is not currently associated with an approved pharmaceutical drug product in major jurisdictions. The term refers to a regulatory classification pathway used for novel medical devices that do not have a legally marketed predicate device. This pathway is formally known as the De Novo Classification Request.

Interaction Profile

Because no pharmaceutical drug product named Denovo has been officially classified and approved by major regulatory agencies, no official labeling exists that details drug-drug, drug-food, or drug-product interactions. Consequently, regulatory documents do not provide information on:

  • Interacting Medicinal Product Categories: No officially listed drug classes or specific compounds that must be avoided or used with caution.
  • Mechanistic Basis of Interactions: No documented statements regarding pharmacokinetic effects, such as inhibition or induction of cytochrome P450 (CYP) enzymes or drug transporters.
  • Timing-Based Interaction Rules: No specified requirements for spacing the administration of this product from other medications or foods.

Patients should be aware that the lack of information is due to the product's absence from the pharmaceutical regulatory landscape, not a determination of safety. Always consult a healthcare professional regarding any medication or product being considered.

Mechanism of Action

Antagonizing Central Histamine Receptors to Modulate Emetic Signals

The primary mechanism involves the Doxylamine component competitively blocking Histamine H1 receptors and Muscarinic Acetylcholine Receptors in the Central Nervous System (CNS). This molecular action directly inhibits the signal transmission from the vestibular system and the Chemoreceptor Trigger Zone ( CTZ) to the brain's Vomiting Center, resulting in reduced signal transmission to the final common pathway for emesis.


Facilitating Neurochemical Function with Essential Cofactors

This supporting domain utilizes Pyridoxine and folates (L-methylfolate), which function as crucial coenzymes in CNS metabolism. Pyridoxine provides the cofactor ( P5P) necessary for synthesizing and regulating neurotransmitters, while folates are necessary for metabolic functions related to the C1 cycle. This mechanism does not directly block the emetic reflex but contributes to the stabilization of CNS enzymatic function necessary for neurotransmitter regulation, which acts synergistically with the direct receptor blockade.


Dual Mechanism Integration for Pathway Management

The combined action involves Doxylamine inhibiting active emetic signaling pathways, while the B-vitamin components facilitate necessary metabolic functions within the neurons. This dual mechanism addresses both receptor-level signaling and the biochemical requirements for sustained CNS metabolic function.

Dosage and Administration Information

How to Use Denovo: Administration Guidelines

This section outlines the general principles and administration patterns for the delayed-release oral tablet formulation (Doxylamine 10 mg/Pyridoxine 10 mg).


Administration Scope

Instruction Detail
Route of administration Oral
Dosing schedule The regimen follows a titration schedule starting with two 10 mg/10 mg tablets taken at bedtime on Day 1. The daily dose may be gradually increased based on response, up to a maximum of four tablets daily (taken across three scheduled times).
Timing in relation to meals Must be administered on an empty stomach with a glass of water
Age-group administration Not indicated for use in children under 18 years of age.
Missed-dose rule If a dose is missed, the patient should not take the missed dose or an extra dose, but should resume the original dosing schedule the next day.
Special procedural conditions The delayed-release tablets must be swallowed whole and must not be crushed, chewed, or split.

Resulting Procedural Structure

Step sequence:

  • Initiation: The treatment begins with a foundational dose taken at bedtime.
  • Titration: The dosage is systematically adjusted over several days, increasing to a maximum of four tablets daily until the maximum dose is reached.
  • Ingestion: The tablet must be swallowed whole and unchewed with water while the stomach is empty.
  • Discontinuation: The dose must be tapered gradually before fully stopping the medicine to prevent symptom re-emergence.

Connection to the overall use protocol: The instructions establish a titrated daily schedule for the oral administration of the fixed-dose combination. This protocol specifies the initial dosage, guides the maximum intake over time, and defines the physical conditions for use, such as the requirement to take the tablet whole and on an empty stomach.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Denovo

The Primary Research Focus: Nausea and Vomiting of Pregnancy (NVP)

The primary evidence base for the doxylamine and pyridoxine components was studied for Nausea and Vomiting of Pregnancy (NVP). This research was evaluated in studies exploring how symptoms change over time in women experiencing this condition. These studies are often short-term, placebo-controlled Randomized Controlled Trials (RCTs). This means that researchers compared groups who received the active combination against groups who received an inactive pill (a placebo) to see what patterns were observed in the studies.

These trials included pregnant adult women usually in the first trimester. Research examined outcomes related to the severity of physical discomfort. Findings describe patterns observed in the studies over short time intervals (e.g., 7 to 14 days).

How Studies Measured Symptom Change

Studies monitored the level of nausea, vomiting, and retching that patients experienced. The primary outcome assessed was the change in symptom severity, measured using specialized instruments like the Pregnancy-Unique Quantification of Emesis and Nausea (PUQE) scale. This tool allows researchers to quantify and track patient-reported outcomes describing perceived discomfort. Research highlights changes measured during the study period but does not determine whether an individual will respond similarly, as study results reflect the specific conditions under which they were conducted.


Evidence for the Nutritional Components

Denovo includes the essential nutrients pyridoxine (Vitamin B6), folic acid, and L-methylfolate. The evidence base for these components is generally derived from nutritional epidemiology and metabolic studies, which look at the established role of these vitamins in maintaining key metabolic functions. The research was evaluated in settings addressing systemic or functional imbalance.


Research in Specific Populations

The primary research for the combination was observed in a specific group: pregnant women with moderate NVP symptoms, often in the first trimester. Therefore, results apply only to the populations studied in the pivotal trials. Data for children, older adults, and other populations remain insufficient.


Evidence Gaps and Areas of Ongoing Research

The research on doxylamine and pyridoxine is built upon a foundation of pivotal RCTs submitted to regulatory authorities, yet certain areas remain uncertain. For example, comparative evidence is lacking for trials directly comparing the doxylamine/pyridoxine combination against other active prescription medications used for NVP. Evidence quality varies across studies, and future research can help address where certain group findings are uncertain.

Key Studies & References

  1. NIH Office of Dietary Supplements: Folate Fact Sheet for Health Professionals

Frequently Asked Questions (FAQ)

Common questions about Denovo (FAQ)

Q: What is the main reason doctors prescribe Denovo?

A: Official regulatory documents indicate that this medicine is prescribed for the treatment of nausea and vomiting of pregnancy (NVP). It is intended for women whose symptoms have not responded adequately to conservative management options.

Q: Is Denovo used to treat conditions other than its main approved purpose?

A: The official labeling specifies that the medicine is indicated for NVP only. Regulatory information does not describe its use for other conditions. For example, the medication has not been studied in women with severe vomiting during pregnancy, known as hyperemesis gravidarum.

Q: How quickly should I expect Denovo to start working?

A: The medication is typically administered on a scheduled daily basis, not to be taken just when symptoms occur. One of the active components, doxylamine, has a reported half-life of nearly 12 hours. The schedule is intended to manage symptoms over time, reflecting that the medicine works over a sustained period.

Q: What is the typical time frame to see the full effect of Denovo?

A: The official dosing protocol involves a systematic titration schedule, where the daily dose may be gradually increased over several days. This schedule indicates that symptom control may be achieved after several days of treatment.

Q: Are there any common foods or drinks I need to avoid while taking Denovo?

A: Official administration instructions state that the tablet must be taken on an empty stomach with a glass of water. Regulatory warnings advise against the concurrent use of alcohol. This combination has the potential to result in severe drowsiness, which is associated with an increased risk of falls or accidents.

Q: Can Denovo cause problems with sleep?

A: Due to its antihistamine properties, the medicine commonly causes somnolence (drowsiness). Official documents also list other adverse reactions related to sleep, such as insomnia (difficulty sleeping) and nightmares, based on clinical experience.

Q: Is it normal to feel a bit tired when starting Denovo?

A: Yes, drowsiness (somnolence) is the most common side effect reported in clinical studies. Fatigue and malaise (a general feeling of discomfort or illness) are also listed as common adverse reactions.

Q: How does Denovo affect driving or operating machinery?

A: Regulatory documents state that individuals should avoid engaging in activities requiring complete mental alertness, such as driving or operating heavy machinery, due to the risk of somnolence (drowsiness).

Q: Is Denovo safe for people with liver issues?

A: The doxylamine component is metabolized (processed) in the liver. Because of this, official documents imply that a patient’s existing liver function may be a consideration.

Q: Are there any special considerations for people with kidney problems using Denovo?

A: The doxylamine component and its byproducts are excreted by the kidneys. Because of this, official documents imply that a patient’s existing renal (kidney) function may be a consideration.

Q: Will Denovo show up on a standard drug test?

A: Regulatory warnings state that doxylamine succinate may interfere with certain urine screening tests for substances like methadone, opiates, and PCP. This interference could potentially lead to false-positive results. If a positive result occurs, confirmatory laboratory testing is recommended.

Q: How long does Denovo stay in my system after I stop taking it?

A: The doxylamine component has a reported half-life of approximately 11.9 hours. This measurement indicates the time it takes for half of the dose to be eliminated from the body. Full elimination typically takes several half-lives.

Q: Does Denovo have a risk of addiction or dependence?

A: Official product information, while not classifying it as a controlled substance, notes that the doxylamine component is an antihistamine that has been reported to be prone to abuse.

Q: What kind of research has been done on Denovo in children?

A: Official product information, including the FDA label, states that the safety and efficacy of this medication have not been established in patients under 18 years of age.

Q: Can Denovo make my existing health condition worse?

A: Regulatory documents describe that use requires caution in individuals with certain pre-existing conditions. These conditions include asthma, narrow-angle glaucoma, and obstructions in the stomach or urinary tract.

Q: Can Denovo cause headaches or migraines?

A: Yes. Headaches and migraines are listed among the adverse reactions reported in clinical trials and during postmarketing experience with the drug.

Q: What are the most serious side effects of Denovo to watch out for?

A: Serious anticholinergic effects are a primary concern, especially when the drug is combined with other central nervous system (CNS) depressants. These effects can include severe drowsiness, confusion, blurred vision, and difficulty urinating.

Q: How often are people typically reviewed by a doctor while on Denovo?

A: The official dosing protocol involves adjusting the dose based on symptom control during the first few days. Additionally, the need for continued therapy should be reassessed by a healthcare provider as the pregnancy progresses.

Q: Does Denovo affect mood or cause emotional changes?

A: Adverse reactions related to mood and emotion have been reported. These psychiatric disorders can include anxiety, disorientation, and nightmares based on postmarketing experience.

Q: Is Denovo a type of steroid?

A: No. The medication is a fixed-dose combination product of doxylamine succinate, which is an antihistamine, and pyridoxine hydrochloride, which is a vitamin B6 analog. It is not described as a steroid in regulatory documents.

Q: What are the long-term safety data for Denovo?

A: The combination product has been the subject of extensive epidemiological studies to detect any potential for teratogenicity (causing birth defects). These studies have not shown an increased risk for congenital malformations with first-trimester exposure.

Q: Is there a link between Denovo and stomach upset?

A: Yes. Gastrointestinal disorders such as constipation, diarrhea, and abdominal distension/pain are listed among the common adverse reactions reported in official documents.

Q: Why do official materials recommend avoiding Denovo during pregnancy?

A: This question is based on a misunderstanding of the drug's purpose. The medicine is, in fact, specifically indicated for the treatment of nausea and vomiting of pregnancy (NVP).

Q: What is the purpose of the black box warning on Denovo?

A: The official FDA label for the delayed-release tablet formulation of this medication does not include a Black Box Warning.

Q: What are the chances of a serious allergic reaction to Denovo?

A: The medicine is contraindicated (should not be used) in patients who have a known hypersensitivity (allergic reaction) to any of its components. Hypersensitivity is also listed as a serious adverse reaction reported during postmarketing experience.

Q: Can men and women use Denovo for the same reasons?

A: No. The official regulatory indication is specifically limited to the treatment of nausea and vomiting of pregnancy in women.

Q: What is the maximum duration of time someone can take Denovo?

A: The drug is prescribed to manage NVP, a condition associated with pregnancy. The duration of therapy should be reassessed by a healthcare provider as the pregnancy progresses.

Q: Does Denovo interact with alcohol in a minor way or is it a major concern?

A: The official label states that concurrent use with alcohol is not recommended. This warning is given because the combination has the potential to cause severe drowsiness, which is associated with safety risks.

Q: Are there studies comparing Denovo to placebo?

A: Yes. Official documents confirm that the safety and efficacy of the drug were evaluated in a double-blind, randomized, multi-center trial comparing the medication to a placebo (an inactive substance).

Q: Are there any specific lab tests needed before starting Denovo?

A: Official documents do not typically mention routine lab tests for initiation. However, regulatory warnings note that the drug can interfere with certain urine drug screens, requiring confirmatory tests if the screen is positive.

Q: Why do some people discontinue Denovo treatment?

A: Official documents list various adverse events that may lead to the discontinuation of treatment. These include side effects such as somnolence (drowsiness), fatigue, and headache.

Q: Is Denovo a Schedule drug (controlled substance)?

A: No. The medication is a combination of an antihistamine and a vitamin B6 analog. It is not classified as a controlled substance by the FDA.

Q: What are the known drug-drug interactions mentioned in the official label?

A: The drug is specifically contraindicated (should not be taken) alongside Monoamine Oxidase Inhibitors (MAOIs). MAOIs are known to intensify and prolong the adverse central nervous system effects of the medicine.

How should Denovo be stored and disposed of?

How to Store and Dispose of Denovo

Official regulatory labeling dictates strict conditions for storing and disposing of Denovo tablets.

Storage Requirements

Denovo must be stored at controlled room temperature, specifically between 20 C to 25 C (68 F to 77 F); temperatures outside this range or refrigeration are prohibited. The product must be kept in its original container, which should be tightly closed, to protect the tablets from moisture and light. As a mandatory safety requirement, keep the medicine out of the reach and sight of children.

Disposal Instructions

Do not flush unused or expired Denovo down the toilet or throw it into household trash. Disposal must be handled in accordance with local pharmaceutical waste regulations, typically utilizing a medicine take-back program or designated collection site for safe and proper disposal.

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

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