6 Interactions found for:
Drug Interactions
No drug interactions were found for selected drugs: Ozempic, losartan.
This does not necessarily mean no interactions exist. Always consult your healthcare provider.
Drug and Food Interactions
Moderate
Losartan
+ Food
The following applies to the ingredients: Losartan
GENERALLY AVOID: Moderate-to-high dietary intake of potassium, especially salt substitutes, may increase the risk of hyperkalemia in some patients who are using angiotensin II receptor blockers (ARBs). ARBs can promote hyperkalemia through inhibition of angiotensin II-induced aldosterone secretion. Patients with diabetes, heart failure, dehydration, or renal insufficiency have a greater risk of developing hyperkalemia.
MANAGEMENT: Patients should receive dietary counseling and be advised to not use potassium-containing salt substitutes or over-the-counter potassium supplements without consulting their physician. If salt substitutes are used concurrently, regular monitoring of serum potassium levels is recommended. Patients should also be advised to seek medical attention if they experience symptoms of hyperkalemia such as weakness, irregular heartbeat, confusion, tingling of the extremities, or feelings of heaviness in the legs.
MONITOR: Grapefruit juice may modestly decrease and delay the conversion of losartan to its active metabolite, E3174. The proposed mechanism is inhibition of CYP450 3A4-mediated first-pass metabolism in the gut wall by certain compounds present in grapefruits. The clinical significance is unknown. Moreover, pharmacokinetic alterations associated with interactions involving grapefruit juice are often subject to a high degree of interpatient variability.
MANAGEMENT: Patients who regularly consume grapefruits and grapefruit juice should be monitored for altered efficacy of losartan. Grapefruits and grapefruit juice should be avoided if an interaction is suspected. Orange juice is not expected to interact.
References
- "Product Information. Cozaar (losartan)." Merck & Co., Inc PROD (2001):
- Zaidenstein R, Soback S, Gips M, Avni B, Dishi V, Weissgarten Y, Golik A, Scapa E "Effect of grapefruit juice on the pharmacokinetics of losartan and its active metabolite E3174 in healthy volunteers." Ther Drug Monit 23 (2001): 369-73
- Ray K, Dorman S, Watson R "Severe hyperkalaemia due to the concomitant use of salt substitutes and ACE inhibitors in hypertension: a potentially life threatening interaction." J Hum Hypertens 13 (1999): 717-20
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
Losartan
+ Pregnancy
The following applies to the ingredients: Losartan
This drug should not be used during pregnancy unless there are no alternatives and the benefit outweighs the risk to the fetus.
-Some authorities state that use is contraindicated throughout pregnancy, while others state that use is not recommended during the first trimester of pregnancy and is contraindicated during the second and third trimesters.
AU TGA pregnancy category: D
US FDA pregnancy category: Not assigned.
Risk Summary: Use of drugs that act on the renin angiotensin system (RAS) during the second and third trimesters of pregnancy increases fetal and neonatal morbidity and death.
Comments:
-Adequate methods of contraception should be encouraged.
-Advise female patients of reproductive potential of the potential risk to a fetus.
-The manufacturer recommends discontinuing this drug as soon as possible when pregnancy is detected.
Animal studies have revealed evidence of fetal and neonatal toxicity and mortality. In humans, use of drugs that act on the RAS during the second and third trimesters increases fetal and neonatal toxicity and death. There are no controlled data in human 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. Cozaar (losartan)." Merck & Co., Inc PROD (2001):
- Cerner Multum, Inc. "UK Summary of Product Characteristics." O 0
- Cerner Multum, Inc. "Australian Product Information." O 0
- "Product Information. COZAAR (losartán)." Organon Pharmaceuticals (2022):
- "Product Information. Cozaar (losartan)." Organon Pharma (UK) Ltd (2025):
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
Losartan
+ Breastfeeding
The following applies to the ingredients: Losartan
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: Unknown
Excreted into animal milk: Yes
Comments: The effects in the nursing infant are unknown.
References
- "Product Information. Cozaar (losartan)." Merck & Co., Inc PROD (2001):
- Cerner Multum, Inc. "UK Summary of Product Characteristics." O 0
- Cerner Multum, Inc. "Australian Product Information." O 0
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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