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7 Interactions found for:

Ventolin HFA and metformin
Interactions Summary
  • 3 Major
  • 2 Moderate
  • 2 Minor
  • Ventolin HFA
  • metformin

Drug Interactions

Moderate
Ventolin Hfa + Metformin

The following applies to the ingredients: Albuterol (found in Ventolin Hfa) and Metformin

MONITOR: The efficacy of insulin and other antidiabetic agents may be diminished by certain drugs, including atypical antipsychotics, corticosteroids, diuretics, estrogens, gonadotropin-releasing hormone agonists, human growth hormone, phenothiazines, progestins, protease inhibitors, sympathomimetic amines, thyroid hormones, L-asparaginase, alpelisib, copanlisib, danazol, diazoxide, isoniazid, megestrol, omacetaxine, phenytoin, sirolimus, tagraxofusp, temsirolimus, as well as pharmacologic dosages of nicotinic acid and adrenocorticotropic agents. These drugs may interfere with blood glucose control because they can cause hyperglycemia, glucose intolerance, new-onset diabetes mellitus, and/or exacerbation of preexisting diabetes.

MANAGEMENT: Caution is advised when drugs that can interfere with glucose metabolism are prescribed to patients with diabetes. Close clinical monitoring of glycemic control is recommended following initiation or discontinuation of these drugs, and the dosages of concomitant antidiabetic agents adjusted as necessary. Patients should be advised to notify their physician if their blood glucose is consistently high or if they experience symptoms of severe hyperglycemia such as excessive thirst and increases in the volume or frequency of urination. Likewise, patients should be observed for hypoglycemia when these drugs are withdrawn from their therapeutic regimen.

References

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  12. Diamond MT "Hyperglycemic hyperosmolar coma associated with hydrochlorothiazide and pancreatitis." N Y State J Med 72 (1972): 1741-2
  13. Jones IG, Pickens PT "Diabetes mellitus following oral diuretics." Practitioner 199 (1967): 209-10
  14. Black DM, Filak AT "Hyperglycemia with non-insulin-dependent diabetes following intraarticular steroid injection." J Fam Pract 28 (1989): 462-3
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  34. Virutamasen P, Wongsrichanalai C, Tangkeo P, Nitichai Y, Rienprayoon D "Metabolic effects of depot-medroxyprogesterone acetate in long-term users: a cross-sectional study." Int J Gynaecol Obstet 24 (1986): 291-6
  35. Dimitriadis G, Tegos C, Golfinopoulou L, Roboti C, Raptis S "Furosemide-induced hyperglycaemia - the implication of glycolytic kinases." Horm Metab Res 25 (1993): 557-9
  36. Goldman JA, Ovadia JL "The effect of estrogen on intravenous glucose tolerance in woman." Am J Obstet Gynecol 103 (1969): 172-8
  37. Hannaford PC, Kay CR "Oral contraceptives and diabetes mellitus." BMJ 299 (1989): 1315-6
  38. Spellacy WN, Ellingson AB, Tsibris JC "The effects of two triphasic oral contraceptives on carbohydrate metabolism in women during 1 year of use." Fertil Steril 51 (1989): 71-4
  39. Ludvik B, Clodi M, Kautzky-Willer A, Capek M, Hartter E, Pacini G, Prager R "Effect of dexamethasone on insulin sensitivity, islet amyloid polypeptide and insulin secretion in humans." Diabetologia 36 (1993): 84-7
  40. Domenet JG "Diabetogenic effect of oral diuretics." Br Med J 3 (1968): 188
  41. Coni NK, Gordon PW, Mukherjee AP, Read PR "The effect of frusemide and ethacrynic acid on carbohydrate metabolism." Age Ageing 3 (1974): 85-90
  42. Schmitz O, Hermansen K, Nielsen OH, Christensen CK, Arnfred J, Hansen HE, Mogensen CE, Orskov H, Beck-Nielsen H "Insulin action in insulin-dependent diabetics after short-term thiazide therapy." Diabetes Care 9 (1986): 631-6
  43. Blayac JP, Ribes G, Buys D, Puech R, Loubatieres-Mariani MM "Effects of a new benzothiadiazine derivative, LN 5330, on insulin secretion." Arch Int Pharmacodyn Ther 253 (1981): 154-63
  44. Elmfeldt D, Berglund G, Wedel H, Wilhelmsen L "Incidence and importance of metabolic side-effects during antihypertensive therapy." Acta Med Scand Suppl 672 (1983): 79-83
  45. Winchester JF, Kellett RJ, Boddy K, Boyle P, Dargie HJ, Mahaffey ME, Ward DM, Kennedy AC "Metolazone and bendroflumethiazide in hypertension: physiologic and metabolic observations." Clin Pharmacol Ther 28 (1980): 611-8
  46. Petri M, Cumber P, Grimes L, Treby D, Bryant R, Rawlins D, Ising H "The metabolic effects of thiazide therapy in the elderly: a population study." Age Ageing 15 (1986): 151-5
  47. "Product Information. Glucophage (metformin)." Bristol-Myers Squibb PROD (2001):
  48. Harper R, Ennis CN, Heaney AP, Sheridan B, Gormley M, Atkinson AB, Johnston GD, Bell PM "A comparison of the effects of low- and conventional-dose thiazide diuretic on insulin action in hypertensive patients with NIDDM." Diabetologia 38 (1995): 853-9
  49. "Product Information. Precose (acarbose)." Bayer PROD (2001):
  50. "Product Information. Norvir (ritonavir)." Abbott Pharmaceutical PROD (2001):
  51. "Product Information. Amaryl (glimepiride)." Hoechst Marion Roussel PROD (2001):
  52. Charan VD, Desai N, Singh AP, Choudhry VP "Diabetes mellitus and pancreatitis as a complication of L- asparaginase therapy." Indian Pediatr 30 (1993): 809-10
  53. Seifer DB, Freedman LN, Cavender JR, Baker RA "Insulin-dependent diabetes mellitus associated with danazol." Am J Obstet Gynecol 162 (1990): 474-5
  54. "Product Information. Crixivan (indinavir)." Merck & Co., Inc PROD (2001):
  55. Pickkers P, Schachter M, Hughes AD, Feher MD, Sever PS "Thiazide-induced hyperglycaemia: a role for calcium-activated potassium channels?" Diabetologia 39 (1996): 861-4
  56. "Product Information. Viracept (nelfinavir)." Agouron Pharma Inc PROD (2001):
  57. Dube MP, Johnson DL, Currier JS, Leedom JM "Protease inhibitor-associated hyperglycaemia." Lancet 350 (1997): 713-4
  58. "Product Information. Oncaspar (pegaspargase)." Rhone Poulenc Rorer PROD (2001):
  59. "Product Information. Prandin (repaglinide)." Novo Nordisk Pharmaceuticals Inc PROD (2001):
  60. "Product Information. Elspar (asparaginase)." Merck & Co., Inc PROD (2001):
  61. "Product Information. Hyperstat (diazoxide)." Apothecon Inc (2022):
  62. "Product Information. Megace (megestrol)." Bristol-Myers Squibb PROD (2001):
  63. Walli R, Demant T "Impaired glucose tolerance and protease inhibitors." Ann Intern Med 129 (1998): 837-8
  64. "Product Information. Agenerase (amprenavir)." Glaxo Wellcome PROD (2001):
  65. Mauss S, Wolf E, Jaeger H "Impaired glucose tolerance in HIV-positive patients receiving and those not receiving protease inhibitors." Ann Intern Med 130 (1999): 162-3
  66. Kaufman MB, Simionatto C "A review of protease inhibitor-induced hyperglycemia." Pharmacotherapy 19 (1999): 114-7
  67. "Product Information. Tolinase (tolazamide)." Pharmacia and Upjohn PROD (2001):
  68. "Product Information. Orinase (tolbutamide)." Pharmacia and Upjohn PROD (2001):
  69. "Product Information. Dymelor (acetohexamide)." Lilly, Eli and Company PROD (2001):
  70. Wehring H, Alexander B, Perry PJ "Diabetes mellitus associated with clozapine therapy." Pharmacotherapy 20 (2000): 844-7
  71. Tsiodras S, Mantzoros C, Hammer S, Samore M "Effects of protease inhibitors on hyperglycemia, hyperlipidemia, and lipodystrophy - A 5-year cohort study." Arch Intern Med 160 (2000): 2050-6
  72. "Product Information. Fortovase (saquinavir)." Roche Laboratories PROD (2001):
  73. "Product Information. Starlix (nateglinide)." Novartis Pharmaceuticals PROD (2001):
  74. Hardy H, Esch LD, Morse GD "Glucose disorders associated with HIV and its drug therapy." Ann Pharmacother 35 (2001): 343-51
  75. Leary WP, Reyes AJ "Drug interactions with diuretics." S Afr Med J 65 (1984): 455-61
  76. "Product Information. NovoLOG Mix 70/30 (insulin aspart-insulin aspart protamine)." Novo Nordisk Pharmaceuticals Inc (2022):
  77. "Product Information. Reyataz (atazanavir)." Bristol-Myers Squibb (2003):
  78. "Product Information. Lexiva (fosamprenavir)." GlaxoSmithKline (2003):
  79. "Product Information. Apidra (insulin glulisine)." Aventis Pharmaceuticals (2004):
  80. "Product Information. Prezista (darunavir)." Ortho Biotech Inc (2006):
  81. "Product Information. Zolinza (vorinostat)." Merck & Co., Inc (2006):
  82. "Product Information. Torisel (temsirolimus)." Wyeth-Ayerst Laboratories (2007):
  83. "Product Information. Rexulti (brexpiprazole)." Otsuka American Pharmaceuticals Inc (2015):
  84. "Product Information. Elzonris (tagraxofusp)." Stemline Therapeutics (2019):
  85. "Product Information. Piqray (alpelisib)." Novartis Pharmaceuticals (2019):

Drug and Food Interactions

Major
Metformin + Food

The following applies to the ingredients: Metformin

GENERALLY AVOID: Alcohol can potentiate the effect of metformin on lactate metabolism and increase the risk of lactic acidosis. In addition, alcohol may cause hypoglycemia or hyperglycemia in patients with diabetes. Although hypoglycemia rarely occurs during treatment with metformin alone, the risk may increase with acute consumption of alcohol. Even modest amounts can lower blood sugar significantly, especially when the alcohol is ingested on an empty stomach or following exercise. The mechanism involves inhibition of both gluconeogenesis as well as the counter-regulatory response to hypoglycemia. Episodes of hypoglycemia may last for 8 to 12 hours after ethanol ingestion. By contrast, chronic alcohol abuse can cause impaired glucose tolerance and hyperglycemia. Moderate alcohol consumption generally does not affect blood glucose levels in patients with well controlled diabetes.

Food may have varying effects on the absorption of metformin from immediate-release versus extended-release formulations. When a single 850 mg dose of immediate-release metformin was administered with food, mean peak plasma concentration (Cmax) and systemic exposure (AUC) decreased by 40% and 25%, respectively, and time to peak plasma concentration (Tmax) increased by 35 minutes compared to administration under fasting conditions. By contrast, administration of extended-release metformin with food increased AUC by 50% without affecting Cmax or Tmax, and both high- and low-fat meals had the same effect. These data may not be applicable to formulations that contain metformin with other oral antidiabetic agents.

MANAGEMENT: Metformin should be taken with meals, and excessive alcohol intake should be avoided during treatment. Diabetes patients in general should avoid consuming alcohol if their blood glucose is not well controlled, or if they have hypertriglyceridemia, neuropathy, or pancreatitis. Alcohol should not be consumed on an empty stomach or following exercise, as it may increase the risk of hypoglycemia. Patients should contact their physician immediately if they experience potential signs and symptoms of lactic acidosis such as malaise, myalgia, respiratory distress, increasing somnolence, and nonspecific abdominal distress (especially after stabilization of metformin therapy, when gastrointestinal symptoms are uncommon). With more marked acidosis, there may also be associated hypothermia, hypotension, and resistant bradyarrhythmias. Metformin should be withdrawn promptly if lactic acidosis is suspected. Serum electrolytes, ketones, blood glucose, blood pH, lactate levels, and blood metformin levels may be useful in establishing a diagnosis. Lactic acidosis should be suspected in any diabetic patient with metabolic acidosis lacking evidence of ketoacidosis (ketonuria and ketonemia).

References

  1. "Product Information. Glucophage (metformin)." Bristol-Myers Squibb PROD (2001):
  2. "Position Statement: evidence-based nutrition principles and recommendations for the treatment and prevention of diabetes related complications. American Diabetes Association." Diabetes Care 25(Suppl 1) (2002): S50-S60

Moderate
Ventolin Hfa + Food

The following applies to the ingredients: Albuterol (found in Ventolin Hfa)

MONITOR: Coadministration of two or more sympathomimetic agents may increase the risk of adverse effects such as nervousness, irritability, and increased heart rate. Central nervous system (CNS) stimulants, particularly amphetamines, can potentiate the adrenergic response to vasopressors and other sympathomimetic agents. Additive increases in blood pressure and heart rate may occur due to enhanced peripheral sympathetic activity.

MANAGEMENT: Caution is advised if two or more sympathomimetic agents are coadministered. Pulse and blood pressure should be closely monitored.

References

  1. Rosenblatt JE, Lake CR, van Kammen DP, Ziegler MG, Bunney WE Jr "Interactions of amphetamine, pimozide, and lithium on plasma norepineophrine and dopamine-beta-hydroxylase in schizophrenic patients." Psychiatry Res 1 (1979): 45-52
  2. Cavanaugh JH, Griffith JD, Oates JA "Effect of amphetamine on the pressor response to tyramine: formation of p-hydroxynorephedrine from amphetamine in man." Clin Pharmacol Ther 11 (1970): 656
  3. "Product Information. Adderall (amphetamine-dextroamphetamine)." Shire Richwood Pharmaceutical Company Inc PROD (2001):
  4. "Product Information. Tenuate (diethylpropion)." Aventis Pharmaceuticals PROD (2001):
  5. "Product Information. Sanorex (mazindol)." Novartis Pharmaceuticals PROD (2001):
  6. "Product Information. Focalin (dexmethylphenidate)." Mikart Inc (2001):
  7. "Product Information. Strattera (atomoxetine)." Lilly, Eli and Company (2002):

Drug and Pregnancy Interactions

The following applies to the ingredients: Albuterol (found in Ventolin Hfa)

The manufacturer makes no recommendation regarding use during pregnancy.

AU TGA pregnancy category: A
US FDA pregnancy category: Not assigned

Comments:
-There are no randomized clinical studies of albuterol use during pregnancy, but available information on pregnancy exposure by inhalation do not consistently show miscarriage or major birth defects.
-This drug is known to cross the placental barrier, as evidenced by increases in fetal heart rate.
-Beta-agonists, including this drug, may potentially interfere with uterine contractility.
-In women with poorly or moderately controlled asthma, there is an increased risk of preeclampsia in the mother and prematurity, low birth weight, and small for gestational age in the neonate. Pregnant women should be closely monitored and the dose adjusted as necessary to maintain optimal control.
-In some countries, intravenous injection presentations of this drug have been approved for delay pre-term labor (tocolytic agent) and should not be used in the management of uncomplicated premature labor.

Epidemiological studies and postmarketing case reports following inhaled administration of this drug do not consistently demonstrate a risk of major birth defects or miscarriage. In animal reproduction studies, subcutaneous administration to pregnant mice evidence of cleft palate at less than and up to 9 times the maximum recommended human daily inhalation dose (MRHDID). A study in pregnant rats demonstrated that drug-related material was transferred from the maternal circulation to the fetus. There are no controlled data in human pregnancy.
During worldwide marketing experience, various congenital anomalies, including cleft palate and limb defects, have been reported in the offspring of patients being treated with this drug. Some of the mothers were taking multiple medications during their pregnancies. A relationship between the use of this drug and congenital anomalies has not been established. Profuse uterine bleeding following spontaneous abortion has been reported after the use of this drug. Special care is required in pregnant diabetic women. The background birth defect and miscarriage risk for the indicated population is not known. In the US general population, the estimated major birth defect risk is 2 to 4% and the miscarriage risk is 15 to 20%.


A pregnancy exposure registry monitors outcomes after exposure to asthma medications during pregnancy. For more information, contact the Mothers To Baby Pregnancy Studies conducted by the Organization of Teratology Information Specialists at http://mothertobaby.org/pregnancystudies/.


AU TGA pregnancy category A: Drugs which have been taken by a large number of pregnant women and women of childbearing age without any proven increase in the frequency of malformations or other direct or indirect harmful effects on the fetus having been observed.

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

  1. Lunell NO, Joelsson I, Bjorkman U, Lamb P, Persson B "The use of salbutamol in obstetrics." Acta Obstet Gynecol Scand 55 (1976): 333-6
  2. Davies AE, Robertson MJ "Pulmonary oedema after the administration of intravenous salbutamol and ergometrine. Case report." Br J Obstet Gynaecol 87 (1980): 539-41
  3. Watson NA, Morgan B "Pulmonary oedema and salbutamol in preterm labour. Case report and literature review." Br J Obstet Gynaecol 96 (1989): 1445-8
  4. Lind T, Godfrey KA, Gerrard J, Bryson MR "Continuous salbutamol infusion over 17 weeks to pre-empt premature labour." Lancet 2 (1980): 1165-6
  5. Tan SN "Peri-partum pulmonary oedema." Anaesth Intensive Care 19 (1991): 111-3
  6. Hawker F "Five cases of pulmonary oedema associated with beta 2-sympathomimetic treatment of premature labour." Anaesth Intensive Care 12 (1984): 159-62
  7. Martin AJ "Severe unwanted effects associated with betasympathomimetics when used in the treatment of premature labour: causes, incidence and preventative measures." Br J Clin Pract 35 (1981): 325-9
  8. "Product Information. Proventil (albuterol)." Schering Corporation PROD (2002):
  9. "Product Information. Ventolin (albuterol)." Glaxo Wellcome PROD (2002):
  10. Rayburn WF, Atkinson BD, Gilbert K, Turnbull GL "Short-term effects of inhaled albuterol on maternal and fetal circulations." Am J Obstet Gynecol 171 (1994): 770-3
  11. Mcdonald CF, Burdon JGW "Asthma in pregnancy and lactation - a position paper for the thoracic society of australia and new zealand." Med J Aust 165 (1996): 485-8
  12. Dombrowski MP "Pharmacologic therapy of asthma during pregnancy." Obstet Gynecol Clin North Am 24 (1997): 559
  13. Cerner Multum, Inc. "UK Summary of Product Characteristics." O 0
  14. Cerner Multum, Inc. "Australian Product Information." O 0
  15. "Product Information. Albuterol Extended Release (albuterol)." Dava Pharmaceuticals Inc (2022):
  16. "Product Information. Albuterol Sulfate (albuterol)." Vista Pharm Inc (2022):
  17. "Product Information. Albuterol (albuterol)." Physicians Total Care (2022):

The following applies to the ingredients: Metformin

Benefit should outweigh risk

AU TGA pregnancy category: C
US FDA pregnancy category: Not assigned

Risk Summary: Data are not sufficient to inform a drug-associated risk for major birth defects or miscarriage; published studies have not reported an increased risk. There are risks to the mother and fetus associated with poorly controlled diabetes in pregnancy.

Comments:
-Maternal glucose levels should be well controlled prior to conception and throughout pregnancy to avoid maternal and fetal diabetes-associated risks.
-Premenopausal women should understand the potential for unintended pregnancy with use of this drug as ovulation may occur in some anovulatory women.

Animal studies do not indicate harmful effects with respect to pregnancy, embryo or fetal development, birth or postnatal development. Poorly-controlled diabetes in pregnancy increases the maternal risk for diabetic ketoacidosis, pre-eclampsia, spontaneous abortions, preterm delivery, stillbirth and delivery complications. Poorly controlled maternal diabetes increases the fetal risk for major birth defects, stillbirth, and macrosomia related morbidity. Published evidence suggests this drug has a good safety profile in women with no increased long-term effects in offspring up to 18 months; however, much of the evidence is from observational, small, and/or nonrandomized studies, and therefore data must be interpreted cautiously.

Many experts continue to recommend insulin as the drug of choice for type 1, type 2, and gestational diabetes when diet alone is unsuccessful in controlling blood sugars. The estimated background risk for major birth defects in women with pre-gestational diabetes mellitus with an HbA1C greater than 7 is 6% to 10% and for women with a HbA1C greater than 10, this risk has been reported to be as high as 20% to 25%. In the US, the estimated risk of major birth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively. The estimated risk of miscarriage for pregnant women with diabetes is unknown. There are no adequate and well-controlled studies in pregnant women.

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

  1. "Product Information. Glucophage (metformin)." Bristol-Myers Squibb PROD (2001):
  2. Cerner Multum, Inc. "UK Summary of Product Characteristics." O 0
  3. Cerner Multum, Inc. "Australian Product Information." O 0
  4. "Product Information. Fortamet (metformin)." Physicians Total Care (2014):
  5. "Product Information. Glumetza (metformin)." Biovail Pharmaceuticals Canada (2014):
  6. "Product Information. Riomet (metformin)." Ranbaxy Pharmaceuticals (2014):
  7. Lindsay RS, Loeken MR "Metformin use in pregnancy: promises and uncertainties" Diabetologia 60 (2017): 1612-9
  8. Kelley KW, Carroll DG, Meyer A "A review of current treatment strategies for gestational diabetes mellitus." Drugs Context 4 (2015): epub

Drug and Breastfeeding Interactions

The following applies to the ingredients: Albuterol (found in Ventolin Hfa)

The manufacturer makes no recommendation regarding use during lactation.

Excreted into human milk: Unknown
Excreted into animal milk: Data not available

Comments:
-There is no information regarding this drug on the presence in human milk, the effects on a breastfed infant, or effects on milk production.
-Consider the developmental and health benefits of breastfeeding along with the mother's clinical need for this medication as well as any potential adverse effects from this drug or the underlying maternal condition.

References

  1. "Product Information. Proventil (albuterol)." Schering Corporation PROD (2002):
  2. "Product Information. Ventolin (albuterol)." Glaxo Wellcome PROD (2002):
  3. Mcdonald CF, Burdon JGW "Asthma in pregnancy and lactation - a position paper for the thoracic society of australia and new zealand." Med J Aust 165 (1996): 485-8
  4. Cerner Multum, Inc. "UK Summary of Product Characteristics." O 0
  5. Cerner Multum, Inc. "Australian Product Information." O 0
  6. "Product Information. Albuterol Extended Release (albuterol)." Dava Pharmaceuticals Inc (2022):
  7. "Product Information. Albuterol Sulfate (albuterol)." Vista Pharm Inc (2022):
  8. "Product Information. Albuterol (albuterol)." Physicians Total Care (2022):

The following applies to the ingredients: Metformin

Benefit should outweigh risk

Excreted into human milk: Yes

Comments:
-Available data have not reported adverse effects in breastfed infants, however, this data is limited.
-Due to this limited data, product manufacturers recommend a decision should be made to discontinue nursing or discontinue the drug, considering the importance of the drug to the mother.
-Published data suggest this drug is compatible with breastfeeding; they recommend caution when nursing a newborn or premature infant, and those with renal impairment.

Drug levels are expected to be 0.5% (range 0.11% to 1%) of the mother's weight-adjusted dosage and milk/plasma ratio range between 0.13 and 1. Since milk levels are expected to be relatively constant, timing of breastfeeding with drug administration is expected to be of little benefit. One large prospective study found no adverse effects in breastfed infants. Low detectable serum levels were found in some breastfed infants.

References

  1. "Product Information. Glucophage (metformin)." Bristol-Myers Squibb PROD (2001):
  2. Cerner Multum, Inc. "UK Summary of Product Characteristics." O 0
  3. Feig DS, Briggs GG, Koren G "Oral antidiabetic agents in pregnancy and lactation: a paradigm shift?" Ann Pharmacother (2007): 1174-80
  4. Cerner Multum, Inc. "Australian Product Information." O 0
  5. United States National Library of Medicine "Toxnet. Toxicology Data Network. http://toxnet.nlm.nih.gov/cgi-bin/sis/htmlgen?LACT" (2013):
  6. "Product Information. Fortamet (metformin)." Physicians Total Care (2014):
  7. "Product Information. Glumetza (metformin)." Biovail Pharmaceuticals Canada (2014):
  8. "Product Information. Riomet (metformin)." Ranbaxy Pharmaceuticals (2014):
  9. Kelley KW, Carroll DG, Meyer A "A review of current treatment strategies for gestational diabetes mellitus." Drugs Context 4 (2015): epub

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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