7 Interactions found for:
Drug Interactions
No drug interactions were found for selected drugs: amlodipine, Ozempic.
This does not necessarily mean no interactions exist. Always consult your healthcare provider.
Drug and Food Interactions
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
Moderate
Amlodipine
+ Food
The following applies to the ingredients: Amlodipine
MONITOR: Many psychotherapeutic and CNS-active agents (e.g., anxiolytics, sedatives, hypnotics, antidepressants, antipsychotics, opioids, alcohol, muscle relaxants) exhibit hypotensive effects, especially during initiation of therapy and dose escalation. Coadministration with antihypertensives and/or agents with hypotensive properties, in particular vasodilators and alpha-blockers, may result in additive effects on blood pressure and orthostasis.
MANAGEMENT: Caution and close monitoring for development of hypotension is advised during coadministration of these agents. Some authorities recommend avoiding alcohol in patients receiving vasodilating antihypertensive drugs. Patients should be advised to avoid rising abruptly from a sitting or recumbent position and to notify their physician if they experience dizziness, lightheadedness, syncope, orthostasis, or tachycardia. Patients should also avoid driving or operating hazardous machinery until they know how the medications affect them.
References
- Sternbach H "Fluoxetine-associated potentiation of calcium-channel blockers." J Clin Psychopharmacol 11 (1991): 390-1
- Shook TL, Kirshenbaum JM, Hundley RF, Shorey JM, Lamas GA "Ethanol intoxication complicating intravenous nitroglycerin therapy." Ann Intern Med 101 (1984): 498-9
- Feder R "Bradycardia and syncope induced by fluoxetine." J Clin Psychiatry 52 (1991): 139
- Ellison JM, Milofsky JE, Ely E "Fluoxetine-induced bradycardia and syncope in two patients." J Clin Psychiatry 51 (1990): 385-6
- Rodriguez de la Torre B, Dreher J, Malevany I, et al. "Serum levels and cardiovascular effects of tricyclic antidepressants and selective serotonin reuptake inhibitors in depressed patients." Ther Drug Monit 23 (2001): 435-40
- Cerner Multum, Inc. "Australian Product Information." O 0
- Pacher P, Kecskemeti V "Cardiovascular side effects of new antidepressants and antipsychotics: new drugs, old concerns?" Curr Pharm Des 10 (2004): 2463-75
- Andrews C, Pinner G "Postural hypotension induced by paroxetine." BMJ 316 (1998): 595
- "Product Information. Buprenorphine (buprenorphine)." G.L. Pharma UK Ltd (2023):
- "Product Information. Temgesic (buprenorphine)." Reckitt Benckiser Pty Ltd (2023):
The following applies to the ingredients: Amlodipine
MONITOR: Calcium-containing products may decrease the effectiveness of calcium channel blockers by saturating calcium channels with calcium. Calcium chloride has been used to manage acute severe verapamil toxicity.
MANAGEMENT: Management consists of monitoring the effectiveness of calcium channel blocker therapy during coadministration with calcium products.
References
- Henry M, Kay MM, Viccellio P "Cardiogenic shock associated with calcium-channel and beta blockers: reversal with intravenous calcium chloride." Am J Emerg Med 3 (1985): 334-6
- Moller IW "Cardiac arrest following intravenous verapamil combined with halothane anaesthesia." Br J Anaesth 59 (1987): 522-6
- Oszko MA, Klutman NE "Use of calcium salts during cardiopulmonary resuscitation for reversing verapamil-associated hypotension." Clin Pharm 6 (1987): 448-9
- Schoen MD, Parker RB, Hoon TJ, et al. "Evaluation of the pharmacokinetics and electrocardiographic effects of intravenous verapamil with intravenous calcium chloride pretreatment in normal subjects." Am J Cardiol 67 (1991): 300-4
- O'Quinn SV, Wohns DH, Clarke S, Koch G, Patterson JH, Adams KF "Influence of calcium on the hemodynamic and anti-ischemic effects of nifedipine observed during treadmill exercise testing." Pharmacotherapy 10 (1990): 247
- Woie L, Storstein L "Successful treatment of suicidal verapamil poisoning with calcium gluconate." Eur Heart J 2 (1981): 239-42
- Morris DL, Goldschlager N "Calcium infusion for reversal of adverse effects of intravenous verapamil." JAMA 249 (1983): 3212-3
- Guadagnino V, Greengart A, Hollander G, Solar M, Shani J, Lichstein E "Treatment of severe left ventricular dysfunction with calcium chloride in patients receiving verapamil." J Clin Pharmacol 27 (1987): 407-9
- Luscher TF, Noll G, Sturmer T, Huser B, Wenk M "Calcium gluconate in severe verapamil intoxication." N Engl J Med 330 (1994): 718-20
- Bar-Or D, Gasiel Y "Calcium and calciferol antagonise effect of verapamil in atrial fibrillation." Br Med J (Clin Res Ed) 282 (1981): 1585-6
- Lipman J, Jardine I, Roos C, Dreosti L "Intravenous calcium chloride as an antidote to verapamil-induced hypotension." Intensive Care Med 8 (1982): 55-7
- McMillan R "Management of acute severe verapamil intoxication." J Emerg Med 6 (1988): 193-6
- Perkins CM "Serious verapamil poisoning: treatment with intravenous calcium gluconate." Br Med J 2 (1978): 1127
- Moroni F, Mannaioni PF, Dolara A, Ciaccheri M "Calcium gluconate and hypertonic sodium chloride in a case of massive verapamil poisoning." Clin Toxicol 17 (1980): 395-400
Minor
Amlodipine
+ Food
The following applies to the ingredients: Amlodipine
The consumption of grapefruit juice may slightly increase plasma concentrations of amlodipine. The mechanism is inhibition of CYP450 3A4-mediated first-pass metabolism in the gut wall by certain compounds present in grapefruits. Data have been conflicting and the clinical significance is unknown. Monitoring for calcium channel blocker adverse effects (e.g., headache, hypotension, syncope, tachycardia, edema) is recommended.
References
- Bailey DG, Arnold JMO, Spence JD "Grapefruit juice and drugs - how significant is the interaction." Clin Pharmacokinet 26 (1994): 91-8
- Josefsson M, Zackrisson AL, Ahlner J "Effect of grapefruit juice on the pharmacokinetics of amlodipine in healthy volunteers." Eur J Clin Pharmacol 51 (1996): 189-93
- Bailey DG, Malcolm J, Arnold O, Spence JD "Grapefruit juice-drug interactions." Br J Clin Pharmacol 46 (1998): 101-10
- Vincent J, Harris SI, Foulds G, Dogolo LC, Willavize S, Friedman HL "Lack of effect of grapefruit juice on the pharmacokinetics and pharmacodynamics of amlodipine." Br J Clin Pharmacol 50 (2000): 455-63
- Josefsson M, Ahlner J "Amlodipine and grapefruit juice." Br J Clin Pharmacol 53 (2002): 405; discussion 406
- Kane GC, Lipsky JJ "Drug-grapefruit juice interactions." Mayo Clin Proc 75 (2000): 933-42
Drug and Pregnancy Interactions
Major
Amlodipine
+ Pregnancy
The following applies to the ingredients: Amlodipine
This drug should be used during pregnancy only if the benefit outweighs the risk to the fetus.
-According to some authorities: Use is contraindicated.
AU TGA pregnancy category: C
US FDA pregnancy category: Not assigned
Risk summary: Based on animal data, this drug may cause fetal harm. Inadequate data available on the use of this drug in pregnant women to inform a drug-related risk.
Comments:
-Use of adequate methods of contraception should be encouraged.
-If this drug is used during pregnancy, or if the patient becomes pregnant while taking this drug, the patient should be apprised of the potential harm to the fetus.
Animal studies have shown significantly decreased litter size, increased intrauterine deaths and prolongation of gestation and duration of labor when this drug was given before mating, throughout mating, and during gestation. There are no controlled data in human pregnancy.
Reversible biochemical changes in the head of spermatozoa occurred in some patients treated with calcium channel blockers. There are no controlled data for this drug, but animal models have shown adverse effects on male fertility.
AU TGA pregnancy category C: Drugs which, owing to their pharmacological effects, have caused or may be suspected of causing, harmful effects on the human fetus or neonate without causing malformations. These effects may be reversible. 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. Norvasc (amlodipine)." Pfizer U.S. Pharmaceuticals PROD (2002):
- Cerner Multum, Inc. "UK Summary of Product Characteristics." O 0
- Cerner Multum, Inc. "Australian Product Information." O 0
- "Product Information. Norliqva (amLODIPine)." Carolina Medical Products Company (2022):
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
Amlodipine
+ Breastfeeding
The following applies to the ingredients: Amlodipine
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 (AU, US)
Use is contraindicated (UK)
Excreted into human milk: Yes
Comments:
-The effects in the nursing infant are unknown.
-Infants exposed to this drug should be closely monitored.
References
- "Product Information. Norvasc (amlodipine)." Pfizer U.S. Pharmaceuticals PROD (2002):
- 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):
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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