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Drug Interactions between Pepcid Complete and Tylenol

This report displays the potential drug interactions for the following 2 drugs:

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Interactions between your drugs

Minor

famotidine calcium carbonate

Applies to: Pepcid Complete (calcium carbonate / famotidine / magnesium hydroxide) and Pepcid Complete (calcium carbonate / famotidine / magnesium hydroxide)

Antacids and some aluminum, calcium, and magnesium salts may decrease the plasma concentrations of H2-receptor antagonists during oral coadministration. The mechanism of interaction is unknown, but may involve reduced oral absorption due to increased gastric pH. Study data vary, with no changes to nearly 60% reductions in systemic exposures (AUCs) reported for cimetidine, famotidine, and ranitidine. The clinical significance has not been established. As a precaution, patients may consider taking H2-receptor antagonists one to two hours before antacids.

References (12)
  1. Donn KH, Eshelman FN, Plachetka JR, et al. (1984) "The effects of antacid and propantheline on the absorption of oral ranitidine." Pharmacotherapy, 4, p. 89-92
  2. Albin H, Vincon G, Demotes-Mainard F, et al. (1984) "Effect of aluminium phosphate on the bioavailability of cimetidine and prednisolone." Eur J Clin Pharmacol, 26, p. 271-3
  3. Lin JH, Chremos AN, Kanovsky SM, Schwartz S, Yeh KC, Kann J (1987) "Effects of antacids and food on absorption of famotidine." Br J Clin Pharmacol, 24, p. 551-3
  4. Bodemar G, Norlander B, Walan A (1979) "Diminished absorption of cimetidine caused by antacids." Lancet, 02/24/79, p. 444-5
  5. Steinberg WM, Lewis JH, Katz DM (1982) "Antacids inhibit absorption of cimetidine." N Engl J Med, 307, p. 400-4
  6. Barzaghi N, Gatti G, Crema F, Perucca E (1989) "Impaired bioavailability of famotidine given concurrently with a potent antacid." J Clin Pharmacol, 29, p. 670-2
  7. Russell WL, Lopez LM, Normann SA, et al. (1984) "Effect of antacids on predicted steady-state cimetidine concentrations." Dig Dis Sci, 29, p. 385-9
  8. Shelly DW, Doering PL, Russell WL, Guild RT, Lopez LM, Perrin J (1986) "Effect of concomitant antacid administration on plasma cimetidine concentrations during repetitive dosing." Drug Intell Clin Pharm, 20, p. 792-5
  9. Albin H, Vincon G, Begaud B, Bistue C, Perez P (1987) "Effect of aluminum phosphate on the bioavailability of ranitidine." Eur J Clin Pharmacol, 32, p. 97-9
  10. Mihaly GW, Marino AT, Webster LK, Jones DB, Louis WJ, Smallwood RA (1982) "High dose of antacid (Mylanta II) reduces bioavailability of ranitidine." Br Med J, 285, p. 998-9
  11. Covington TR, eds., Lawson LC, Young LL (1993) "Handbook of Nonprescription Drugs." Washington, DC: American Pharmaceutical Association
  12. Bachmann KA, Sullivan TJ, Jauregui L, Reese J, Miller K, Levine L (1994) "Drug interactions of h-2-receptor antagonists." Scand J Gastroenterol, 29, p. 14-9
Minor

famotidine magnesium hydroxide

Applies to: Pepcid Complete (calcium carbonate / famotidine / magnesium hydroxide) and Pepcid Complete (calcium carbonate / famotidine / magnesium hydroxide)

Antacids and some aluminum, calcium, and magnesium salts may decrease the plasma concentrations of H2-receptor antagonists during oral coadministration. The mechanism of interaction is unknown, but may involve reduced oral absorption due to increased gastric pH. Study data vary, with no changes to nearly 60% reductions in systemic exposures (AUCs) reported for cimetidine, famotidine, and ranitidine. The clinical significance has not been established. As a precaution, patients may consider taking H2-receptor antagonists one to two hours before antacids.

References (12)
  1. Donn KH, Eshelman FN, Plachetka JR, et al. (1984) "The effects of antacid and propantheline on the absorption of oral ranitidine." Pharmacotherapy, 4, p. 89-92
  2. Albin H, Vincon G, Demotes-Mainard F, et al. (1984) "Effect of aluminium phosphate on the bioavailability of cimetidine and prednisolone." Eur J Clin Pharmacol, 26, p. 271-3
  3. Lin JH, Chremos AN, Kanovsky SM, Schwartz S, Yeh KC, Kann J (1987) "Effects of antacids and food on absorption of famotidine." Br J Clin Pharmacol, 24, p. 551-3
  4. Bodemar G, Norlander B, Walan A (1979) "Diminished absorption of cimetidine caused by antacids." Lancet, 02/24/79, p. 444-5
  5. Steinberg WM, Lewis JH, Katz DM (1982) "Antacids inhibit absorption of cimetidine." N Engl J Med, 307, p. 400-4
  6. Barzaghi N, Gatti G, Crema F, Perucca E (1989) "Impaired bioavailability of famotidine given concurrently with a potent antacid." J Clin Pharmacol, 29, p. 670-2
  7. Russell WL, Lopez LM, Normann SA, et al. (1984) "Effect of antacids on predicted steady-state cimetidine concentrations." Dig Dis Sci, 29, p. 385-9
  8. Shelly DW, Doering PL, Russell WL, Guild RT, Lopez LM, Perrin J (1986) "Effect of concomitant antacid administration on plasma cimetidine concentrations during repetitive dosing." Drug Intell Clin Pharm, 20, p. 792-5
  9. Albin H, Vincon G, Begaud B, Bistue C, Perez P (1987) "Effect of aluminum phosphate on the bioavailability of ranitidine." Eur J Clin Pharmacol, 32, p. 97-9
  10. Mihaly GW, Marino AT, Webster LK, Jones DB, Louis WJ, Smallwood RA (1982) "High dose of antacid (Mylanta II) reduces bioavailability of ranitidine." Br Med J, 285, p. 998-9
  11. Covington TR, eds., Lawson LC, Young LL (1993) "Handbook of Nonprescription Drugs." Washington, DC: American Pharmaceutical Association
  12. Bachmann KA, Sullivan TJ, Jauregui L, Reese J, Miller K, Levine L (1994) "Drug interactions of h-2-receptor antagonists." Scand J Gastroenterol, 29, p. 14-9

Drug and food interactions

Major

acetaminophen food

Applies to: Tylenol (acetaminophen)

GENERALLY AVOID: Chronic, excessive consumption of alcohol may increase the risk of acetaminophen-induced hepatotoxicity, which has included rare cases of fatal hepatitis and frank hepatic failure requiring liver transplantation. The proposed mechanism is induction of hepatic microsomal enzymes during chronic alcohol use, which may result in accelerated metabolism of acetaminophen and increased production of potentially hepatotoxic metabolites.

MANAGEMENT: In general, chronic alcoholics should avoid regular or excessive use of acetaminophen. Alternative analgesic/antipyretic therapy may be appropriate in patients who consume three or more alcoholic drinks per day. However, if acetaminophen is used, these patients should be cautioned not to exceed the recommended dosage (maximum 4 g/day in adults and children 12 years of age or older).

References (12)
  1. Kaysen GA, Pond SM, Roper MH, Menke DJ, Marrama MA (1985) "Combined hepatic and renal injury in alcoholics during therapeutic use of acetaminophen." Arch Intern Med, 145, p. 2019-23
  2. O'Dell JR, Zetterman RK, Burnett DA (1986) "Centrilobular hepatic fibrosis following acetaminophen-induced hepatic necrosis in an alcoholic." JAMA, 255, p. 2636-7
  3. Seeff LB, Cuccherini BA, Zimmerman HJ, Adler E, Benjamin SB (1986) "Acetaminophen hepatotoxicity in alcoholics." Ann Intern Med, 104, p. 399-404
  4. Thummel KE, Slattery JT, Nelson SD (1988) "Mechanism by which ethanol diminishes the hepatotoxicity of acetaminophen." J Pharmacol Exp Ther, 245, p. 129-36
  5. McClain CJ, Kromhout JP, Peterson FJ, Holtzman JL (1980) "Potentiation of acetaminophen hepatotoxicity by alcohol." JAMA, 244, p. 251-3
  6. Kartsonis A, Reddy KR, Schiff ER (1986) "Alcohol, acetaminophen, and hepatic necrosis." Ann Intern Med, 105, p. 138-9
  7. Prescott LF, Critchley JA (1983) "Drug interactions affecting analgesic toxicity." Am J Med, 75, p. 113-6
  8. (2002) "Product Information. Tylenol (acetaminophen)." McNeil Pharmaceutical
  9. Whitcomb DC, Block GD (1994) "Association of acetaminopphen hepatotoxicity with fasting and ethanol use." JAMA, 272, p. 1845-50
  10. Bonkovsky HL (1995) "Acetaminophen hepatotoxicity, fasting, and ethanol." JAMA, 274, p. 301
  11. Nelson EB, Temple AR (1995) "Acetaminophen hepatotoxicity, fasting, and ethanol." JAMA, 274, p. 301
  12. Zimmerman HJ, Maddrey WC (1995) "Acetaminophen (paracetamol) hepatotoxicity with regular intake of alcohol: analysis of instances of therapeutic misadventure." Hepatology, 22, p. 767-73
Moderate

calcium carbonate food

Applies to: Pepcid Complete (calcium carbonate / famotidine / magnesium hydroxide)

ADJUST DOSING INTERVAL: Administration with food may increase the absorption of calcium. However, foods high in oxalic acid (spinach or rhubarb), or phytic acid (bran and whole grains) may decrease calcium absorption.

MANAGEMENT: Calcium may be administered with food to increase absorption. Consider withholding calcium administration for at least 2 hours before or after consuming foods high in oxalic acid or phytic acid.

References (6)
  1. Cerner Multum, Inc. "UK Summary of Product Characteristics."
  2. Canadian Pharmacists Association (2006) e-CPS. http://www.pharmacists.ca/function/Subscriptions/ecps.cfm?link=eCPS_quikLink
  3. Cerner Multum, Inc. "Australian Product Information."
  4. Agencia Española de Medicamentos y Productos Sanitarios Healthcare (2008) Centro de información online de medicamentos de la AEMPS - CIMA. https://cima.aemps.es/cima/publico/home.html
  5. Mangels AR (2014) "Bone nutrients for vegetarians." Am J Clin Nutr, 100, epub
  6. Davies NT (1979) "Anti-nutrient factors affecting mineral utilization." Proc Nutr Soc, 38, p. 121-8
Moderate

acetaminophen food

Applies to: Tylenol (acetaminophen)

MONITOR: Smoking cessation may lead to elevated plasma concentrations and enhanced pharmacologic effects of drugs that are substrates of CYP450 1A2 (and possibly CYP450 1A1) and/or certain drugs with a narrow therapeutic index (e.g., flecainide, pentazocine). One proposed mechanism is related to the loss of CYP450 1A2 and 1A1 induction by polycyclic aromatic hydrocarbons in tobacco smoke; when smoking cessation agents are initiated and smoking stops, the metabolism of certain drugs may decrease leading to increased plasma concentrations. The mechanism by which smoking cessation affects narrow therapeutic index drugs that are not known substrates of CYP450 1A2 or 1A1 is unknown. The clinical significance of this interaction is unknown as clinical data are lacking.

MANAGEMENT: Until more information is available, caution is advisable if smoking cessation agents are used concomitantly with drugs that are substrates of CYP450 1A2 or 1A1 and/or those with a narrow therapeutic range. Patients receiving smoking cessation agents may require periodic dose adjustments and closer clinical and laboratory monitoring of medications that are substrates of CYP450 1A2 or 1A1.

References (4)
  1. (2024) "Product Information. Cytisine (cytisinicline)." Consilient Health Ltd
  2. jeong sh, Newcombe D, sheridan j, Tingle M (2015) "Pharmacokinetics of cytisine, an a4 b2 nicotinic receptor partial agonist, in healthy smokers following a single dose." Drug Test Anal, 7, p. 475-82
  3. Vaughan DP, Beckett AH, Robbie DS (1976) "The influence of smoking on the intersubject variation in pentazocine elimination." Br J Clin Pharmacol, 3, p. 279-83
  4. Zevin S, Benowitz NL (1999) "Drug interactions with tobacco smoking: an update" Clin Pharmacokinet, 36, p. 425-38
Minor

famotidine food

Applies to: Pepcid Complete (calcium carbonate / famotidine / magnesium hydroxide)

H2 antagonists may reduce the clearance of nicotine. Cimetidine, 600 mg given twice a day for two days, reduced clearance of an intravenous nicotine dose by 30%. Ranitidine, 300 mg given twice a day for two days, reduced clearance by 10%. The clinical significance of this interaction is not known. Patients should be monitored for increased nicotine effects when using the patches or gum for smoking cessation and dosage adjustments should be made as appropriate.

References (1)
  1. Bendayan R, Sullivan JT, Shaw C, Frecker RC, Sellers EM (1990) "Effect of cimetidine and ranitidine on the hepatic and renal elimination of nicotine in humans." Eur J Clin Pharmacol, 38, p. 165-9

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.

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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.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

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