6 Interactions found for:
Drug Interactions
No drug interactions were found for selected drugs: duloxetine, Ozempic.
This does not necessarily mean no interactions exist. Always consult your healthcare provider.
Drug and Food Interactions
Moderate
Duloxetine
+ Food
The following applies to the ingredients: Duloxetine
GENERALLY AVOID: Use of duloxetine in conjunction with chronic alcohol consumption may potentiate the risk of liver injury. Duloxetine alone can increase serum transaminase levels. In clinical trials, 0.3% of patients discontinued duloxetine due to liver transaminase elevations. The median time to detection was about two months. Three duloxetine-treated patients had liver injury as manifested by transaminase and bilirubin elevations, with evidence of obstruction. Substantial intercurrent ethanol use was present in each of these cases, which may have contributed to the abnormalities observed. Duloxetine does not appear to enhance the central nervous system effects of alcohol. When duloxetine and ethanol were administered several hours apart so that peak concentrations of each would coincide, duloxetine did not increase the impairment of mental and motor skills caused by alcohol.
MANAGEMENT: Due to the risk of liver injury, patients prescribed duloxetine should be counseled to avoid excessive use of alcohol. Duloxetine should generally not be prescribed to patients with substantial alcohol use.
References
- "Product Information. Cymbalta (duloxetine)." Lilly, Eli and Company (2004):
Moderate
Ozempic
+ Food
The following applies to the ingredients: Semaglutide (found in Ozempic)
ADJUST DOSING INTERVAL: Taking oral semaglutide with food, beverage, or other oral medications may alter semaglutide absorption and exposure. In a controlled study with healthy volunteers, limited or no measurable semaglutide exposure was observed in subjects that were fed 30 minutes prior to taking oral semaglutide, while all subjects that fasted overnight and 30 minutes after the oral semaglutide dose had measurable semaglutide exposure. Area under the curve (AUC) and semaglutide peak plasma concentration (Cmax) were approximately 40% greater in subjects that fasted compared to those who did not. AUC and Cmax were also increased with a post-dose fasting period greater than 30 minutes.
MANAGEMENT: It is recommended that oral semaglutide be taken 30 minutes before the first food, beverage, or other oral medications of the day with no more than 4 ounces of plain water to ensure its efficacy. Fasting longer than 30 minutes after the oral semaglutide dose may lead to increased gastrointestinal side effects including nausea, vomiting, or diarrhea.
References
- "Product Information. Rybelsus (semaglutide)." Novo Nordisk Pharmaceuticals Inc (2024):
- "Product Information. Rybelsus (semaglutide)." Novo Nordisk Canada Inc (2024):
- "Product Information. Rybelsus (semaglutide)." Novo Nordisk Ltd (2024):
- Baekdal TA, Breitschaft A, Donsmark M, Maarbjerg SJ, Sondergaard FL, Borregaard J "Effect of various dosing conditions on the pharmacokinetics of oral semaglutide, a human glucagon-like peptide-1 analogue in a tablet formulation" Diabetes Ther 12 (2021): 1915-27
Drug and Pregnancy Interactions
Major
Duloxetine
+ Pregnancy
The following applies to the ingredients: Duloxetine
This drug should not be used during pregnancy unless the benefit outweighs the risk to the fetus.
AU TGA pregnancy category: B3
US FDA pregnancy category: Not assigned.
Risk summary: Observational study data have not produced clear drug-associated risks regarding adverse events or major birth defects.
Comments:
-A pregnancy exposure registry is available.
-Neonates exposed to this drug late in the third trimester may require respiratory support, tube feeding, and/or prolonged hospitalization.
-Exposed neonates should be monitored after delivery for direct toxic effects of this drug, drug discontinuation syndrome, and serotonin syndrome.
-Women who discontinued antidepressant use during pregnancy were more likely to experience a relapse of major depression than women who continued antidepressant use.
Animal studies have revealed increased perinatal toxicity and fetotoxicity at doses potentially correlated with maternal toxicity. There are no controlled data in human pregnancy.
Some neonates exposed to SNRIs (Serotonin and Norepinephrine Reuptake Inhibitors), or SSRIs (Selective Serotonin Reuptake Inhibitors) late in the third trimester had clinical findings including respiratory distress, cyanosis, apnea, seizures, temperature instability, feeding difficulty, vomiting, hypoglycemia, hypotonia, hypertonia, hyperreflexia, tremor, jitteriness, irritability, and constant crying. This clinical picture is consistent with either direct toxic effect of SSRIs and SNRIs, drug discontinuation syndrome, or serotonin syndrome.
A less than 2-fold increase in postpartum hemorrhage was determined by observational data in patients exposed to the drug within 1 month before birth.
A study of women with a history of major depression who were euthymic at the beginning of pregnancy, showed women who discontinued antidepressant medication during pregnancy were more likely to experience a relapse of major depression than women who continued antidepressant medication.
To monitor maternal-fetal outcomes of pregnant women exposed to antidepressant therapy, a National Pregnancy Registry for Antidepressants has been established. Healthcare providers are encouraged to prospectively register patients. For additional information: https://womensmentalhealth.org/clinical-and-research-programs/pregnancyregistry/antidepressants/
Healthcare providers are encouraged to register patients receiving Cymbalta by calling the Cymbalta Pregnancy Registry at 1-866-814-6975 or by visiting www.cymbaltapregnancyregistry.com.
AU TGA pregnancy category B3: Drugs which have been taken by only a limited number of pregnant women and women of childbearing age, without an increase in the frequency of malformation or other direct or indirect harmful effects on the human fetus having been observed. Studies in animals have shown evidence of an increased occurrence of fetal damage, the significance of which is considered uncertain in humans.
US FDA pregnancy category Not Assigned: The US FDA has amended the pregnancy labeling rule for prescription drug products to require labeling that includes a summary of risk, a discussion of the data supporting that summary, and relevant information to help health care providers make prescribing decisions and counsel women about the use of drugs during pregnancy. Pregnancy categories A, B, C, D, and X are being phased out.
References
- "Product Information. Cymbalta (duloxetine)." Lilly, Eli and Company (2004):
- Cerner Multum, Inc. "UK Summary of Product Characteristics." O 0
- Cerner Multum, Inc. "Australian Product Information." O 0
Major
Ozempic
+ Pregnancy
The following applies to the ingredients: Semaglutide (found in Ozempic)
Noncirrhotic metabolic dysfunction-associated steatohepatitis (MASH): This drug should be used during pregnancy only if the benefit outweighs the risk to the fetus.
Type 2 diabetes mellitus: This drug should be used during pregnancy only if the benefit outweighs the risk to the fetus.
-According to some authorities: Use is not recommended.
Weight management: Use is not recommended.
AU TGA pregnancy category: D
US FDA pregnancy category: Not assigned
Risk summary: Limited and insufficient data are available on the use of this drug in pregnant women to inform a drug-related risk; based on animal data, this drug may cause fetal harm.
Comments:
-According to some authorities: Contraception use is recommended during therapy for patients of childbearing potential.
-This drug should be discontinued at least 2 months before a planned pregnancy due to the long half-life.
-Additionally for Wegovy:
---A pregnancy exposure registry is available.
---When a pregnancy is recognized, the patient should be apprised of the potential harm to the fetus and discontinue the drug.
Animal studies have revealed evidence of embryofetal mortality, early pregnancy losses, structural abnormalities, and growth alterations. After subcutaneous dosing in rats, rabbits, and cynomolgus monkeys during organogenesis, pharmacologically mediated maternal toxicity (reduced body weight gain and food consumption) was observed at all dose levels. In rats, reduced growth and fetal abnormalities (visceral and skeletal) were observed at the human exposure. In rabbits, early pregnancy losses and increased rates of minor fetal abnormalities (visceral and skeletal) were seen at clinically relevant exposures. In monkeys, sporadic abnormalities (vertebra, sternebra, ribs) occurred at exposures above the human exposure. Exposures at the no observed adverse effect level in all species were subclinical or only slightly higher than the plasma AUC at the maximum recommended human dose; a direct effect of this drug on the fetus cannot be excluded. Salcaprozate sodium (SNAC), an absorption enhancer in the oral tablet, has been shown to cross the placenta and reach fetal tissues in rats; SNAC was associated with increased gestation length, stillbirths, and decreased pup viability following oral dosing in pregnant rats during gestation and lactation. There are no controlled data in human pregnancy.
To monitor the outcomes of pregnant women exposed to this drug, a pregnancy registry has been established. Pregnant women exposed to Wegovy and health care providers are encouraged to contact the manufacturer at wegovypregnancyregistry.com.
Clinical considerations:
-Noncirrhotic MASH: There may be risks to the mother and fetus related to MASH with advanced liver fibrosis (e.g., increased risks of gestational diabetes, hypertensive complications, preterm birth, postpartum hemorrhage); the effect of this drug on these risks is unknown.
-Type 2 diabetes mellitus: Hypoglycemia and hyperglycemia occur more often during pregnancy in patients with pregestational diabetes; poorly controlled diabetes during pregnancy increases the maternal risk for diabetic ketoacidosis, preeclampsia, spontaneous abortions, preterm delivery, and delivery complications and increases the fetal risk for major birth defects, stillbirth, and macrosomia related morbidity.
-Weight management: Appropriate weight gain based on pre-pregnancy weight is recommended for all pregnant patients because of the obligatory weight gain that occurs in maternal tissues during pregnancy.
AU TGA pregnancy category D: Drugs which have caused, are suspected to have caused or may be expected to cause, an increased incidence of human fetal malformations or irreversible damage. These drugs may also have adverse pharmacological effects. Accompanying texts should be consulted for further details.
US FDA pregnancy category Not Assigned: The US FDA has amended the pregnancy labeling rule for prescription drug products to require labeling that includes a summary of risk, a discussion of the data supporting that summary, and relevant information to help health care providers make prescribing decisions and counsel women about the use of drugs during pregnancy. Pregnancy categories A, B, C, D, and X are being phased out.
References
- "Product Information. Wegovy FlexTouch (semaglutide)." Novo Nordisk Ltd (2026):
- "Product Information. Rybelsus (semaglutide)." Novo Nordisk Ltd 2 (2025):
- "Product Information. Ozempic (semaglutide)." Novo Nordisk Pharmaceuticals Inc SUPPL-37 (2025):
- "Product Information. Ozempic (semaglutide)." Novo Nordisk Ltd (2025):
- "Product Information. Ozempic (0.25 mg or 0.5 mg dose) (semaglutide)." Novo Nordisk Pharmaceuticals Pty Ltd VV-LAB-098353 v10 (2025):
- "Product Information. Rybelsus (semaglutide)." Novo Nordisk Pharmaceuticals Pty Ltd (2022):
- "Product Information. Wegovy (semaglutide)." Novo Nordisk Pharmaceuticals Inc SUPPL-33 (2026):
- "Product Information. Rybelsus (semaglutide)." Novo Nordisk Pharmaceuticals Inc SUPPL-30 (2026):
- "Product Information. Wegovy (0.25 mg dose) (semaglutide)." Novo Nordisk Pharmaceuticals Pty Ltd AU-Wegovy-PI-mPFS VV (2026):
Drug and Breastfeeding Interactions
Major
Duloxetine
+ Breastfeeding
The following applies to the ingredients: Duloxetine
Use is not recommended and a decision should be made to discontinue breastfeeding or discontinue the drug, taking into account the importance of the drug to the mother.
Excreted into human milk: Yes
Comments:
-Some experts state that a more thoroughly studied alternative agent (e.g., nortriptyline, paroxetine, sertraline) may be preferred while breastfeeding premature or neonates.
-The American Academy of Pediatrics classifies other antidepressants as agents for which the effect on nursing infants is unknown but may be of concern.
-Exposed infants should be monitored for developmental milestones, feeding, sedation, weight gain, especially in younger infants who are exclusively breastfed and/or when breastfed infants are exposed to multiple antipsychotropic agents.
The estimated neonatal dose is approximately 0.1% to 0.3% of the maternal dose.
References
- "Product Information. Cymbalta (duloxetine)." Lilly, Eli and Company (2004):
- Cerner Multum, Inc. "UK Summary of Product Characteristics." O 0
- Cerner Multum, Inc. "Australian Product Information." O 0
- United States National Library of Medicine "Toxnet. Toxicology Data Network. http://toxnet.nlm.nih.gov/cgi-bin/sis/htmlgen?LACT" (2013):
- Briggs GG, Freeman RK. "Drugs in Pregnancy and Lactation." Philadelphia, PA: Wolters Kluwer Health (2015):
- National Library of Medicine (US) "Drugs and Lactation Database (LactMed) https://www.ncbi.nlm.nih.gov/books/NBK501922/" (2019):
Major
Ozempic
+ Breastfeeding
The following applies to the ingredients: Semaglutide (found in Ozempic)
Only injectable forms of this drug should be used during breastfeeding.
-According to some authorities: Use is not recommended.
-According to some authorities: Breastfeeding is not recommended during use of the oral form of this drug.
Excreted into human milk: Unknown
Excreted into animal milk: Yes
Comments:
-Injectable formulations: Developmental and health benefits of breastfeeding should be considered as well as the mother's clinical need for this drug. The effects in the nursing infant are unknown; potential adverse effects in the breastfed child due to this drug or the mother's underlying condition should be considered.
---According to some authorities: A risk to a breastfed child cannot be excluded.
-Oral formulations: The absorption enhancer (salcaprozate sodium [SNAC]) and/or its metabolites are present in human milk; enzyme activity involved in SNAC clearance may be lower in infants compared to adults, leading to higher SNAC plasma levels in neonates and infants.
---There is the potential for serious adverse reactions in breastfed infants due to possible SNAC accumulation.
This drug was not detectable in the milk of mothers receiving the subcutaneous formulation. Data from a lactation study with the oral tablet formulation reported drug levels below the lower limit of quantification in human milk.
In a study involving nursing mothers using subcutaneous doses of this drug, milk samples showed no measurable drug levels. If present at the detection limit, the relative infant dose was estimated to be very low. Additionally, breastfed infants of these mothers showed normal growth and development during the period of exposure through breast milk. This drug has poor oral absorption, with a maximum bioavailability of approximately 1% in adults.
Milk samples were collected (at 0, 12, and 24 hours after dosing) from 8 nursing mothers using this drug subcutaneously (0.25 to 1 mg/week); their infants (4 to 23 months old) were mixed fed, receiving breast milk for 3 to 9 weeks during maternal dosing. None of the milk samples contained any measurable drug (less than 1.7 mcg/L), and the mothers reported normal growth and development for their infants. According to author calculation, if drug milk levels were at the detection limit, the relative infant dose would have averaged 1.12%; this did not account for the poor oral absorption of the drug and maximum bioavailability of 1% in adults.
References
- Bethesda (MD): National Institute of Child Health and Human Development (US) "Semaglutide - Drugs and Lactation Database (LactMed) https://www.ncbi.nlm.nih.gov/books/NBK500980/" (2026):
- "Product Information. Wegovy FlexTouch (semaglutide)." Novo Nordisk Ltd (2026):
- "Product Information. Rybelsus (semaglutide)." Novo Nordisk Ltd 2 (2025):
- "Product Information. Ozempic (semaglutide)." Novo Nordisk Pharmaceuticals Inc SUPPL-37 (2025):
- "Product Information. Ozempic (semaglutide)." Novo Nordisk Ltd (2025):
- "Product Information. Ozempic (0.25 mg or 0.5 mg dose) (semaglutide)." Novo Nordisk Pharmaceuticals Pty Ltd VV-LAB-098353 v10 (2025):
- "Product Information. Rybelsus (semaglutide)." Novo Nordisk Pharmaceuticals Pty Ltd (2022):
- "Product Information. Wegovy (semaglutide)." Novo Nordisk Pharmaceuticals Inc SUPPL-33 (2026):
- "Product Information. Rybelsus (semaglutide)." Novo Nordisk Pharmaceuticals Inc SUPPL-30 (2026):
- "Product Information. Wegovy (0.25 mg dose) (semaglutide)." Novo Nordisk Pharmaceuticals Pty Ltd AU-Wegovy-PI-mPFS VV (2026):
Therapeutic Duplication Warnings
No warnings were found for your selected drugs.Therapeutic duplication warnings are only returned when drugs within the same group exceed the recommended therapeutic duplication maximum.
Switch to: Consumer Interactions
| Drug Interaction Classification | |
|---|---|
These classifications are only a guideline. The relevance of a particular drug interaction to a specific individual is difficult to determine. Always consult your healthcare provider before starting or stopping any medication. |
|
| Major | Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit. |
| Moderate | Moderately clinically significant. Usually avoid combinations; use it only under special circumstances. |
| Minor | Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan. |
| Unknown | No interaction information available. |
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