Calcium Carbonate Tablets (Antacid) and Elvitegravir, Cobicistat, Emtricitabine, and Tenofovir Disoproxil Fumarate
Determining the interaction of Calcium Carbonate Tablets (Antacid) and Elvitegravir, Cobicistat, Emtricitabine, and Tenofovir Disoproxil Fumarate and the possibility of their joint administration.
In the database of official manuals used in the service creation an interaction registered by statistical results of studies was found, which can either lead to negative consequences for the patient health or strengthen a mutual positive effect. A doctor should be consulted to address the issue of joint drug administration.
Consumer:Calcium carbonate may decrease the absorption and blood levels of elvitegravir when taken at the same time. Therefore, calcium carbonate should be taken at least 2 hours before or 2 hours after you take elvitegravir. Consult with your doctor if you have any questions or concerns. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.
Professional:ADJUST DOSING INTERVAL: The concomitant use of antacids may significantly decrease the plasma concentrations of elvitegravir. The mechanism of interaction has not been described. When 20 mL of antacid was given 2 hours before a 50 mg dose of elvitegravir with ritonavir (100 mg pharmacokinetic booster dose) to 11 study subjects, mean elvitegravir peak plasma concentration (Cmax), systemic exposure (AUC) and trough plasma concentration (Cmin) were reduced by 18%, 15% and 10%, respectively. When the antacid was given 2 hours after elvitegravir to 10 study subjects, mean elvitegravir Cmax, AUC, and Cmin decreased by approximately 20% each. Larger decreases may be expected if the antacid and elvitegravir doses were administered closer together, although data have not been reported. In contrast, when the antacid was given 4 hours before or 4 hours after elvitegravir, no significant differences were observed in elvitegravir pharmacokinetics compared to administration of elvitegravir alone.
MANAGEMENT: Antacid-containing preparations should be administered at least 2 hours before or 2 hours after the elvitegravir dose. Alternatively, H2-receptor antagonists or proton pump inhibitors may be considered, with no dosage adjustment needed.
- Cerner Multum, Inc. "Australian Product Information." O 0
- "Product Information. Stribild (cobicistat/elvitegravir/emtricitabine/tenofov)." Gilead Sciences, Foster City, CA.
Generic Name: calcium carbonate
Brand name: Calci-Chew, Oysco 500, Calci Mix, Os-Cal 500, Oyst Cal 500, Oyster Shell Calcium 500, Nephro Calci, Amitone, Dicarbosil, Equilet, Tums, Chooz, Tums E-X, Alkets, Titralac, Oyster Cal 500, Calcitab, Oyster Shell, Oyster Calcium, Super Calcium, Calcium Concentrate, Caltro, Oyster, Oyster Cal, Cal Oys, Alkums, Cal-Gest, Tums 500, Tums Ultra, Alka-Mints, Calcarb, Caltrate, Rolaids Sodium Free, Amilac, Calcium Oyster, Oyst Cal, Calcium Liquid Softgel, Mylanta Child, Maalox Quick Dissolve, Maalox Quick Dissolve Maximum Strength, Ultra Mylanta Calci Tabs, Extra Strength Mylanta Calci Tabs, Os-Cal, Surpass, Surpass Extra Strength, Icar Prenatal Chewable Calcium, Tums Extra Strength, Maalox Quick Dissolve Extra Strength, Calcium Oyster Shell, Maalox Antacid Barrier, Rolaids Soft Chew, Pepto Children's, Maalox Regular Strength, Maalox Children's, Tums Kids, Tums QuikPak, Calci-Mix, Alcalak, Tums Smoothies, Tums Chewy Bites, Tums Chewy Delights, Tums Sugar-Free, Cal-Mint, Calci Mix, OsCal 500
Synonyms: Calcium carbonate, Calcium Carbonate
Generic Name: cobicistat / elvitegravir / emtricitabine / tenofovir
Brand name: Genvoya, Stribild
Synonyms: Cobicistat, elvitegravir, emtricitabine, and tenofovir
In the course of checking the drug compatibility and interactions, data from the following reference sources was used: Drugs.com, Rxlist.com, Webmd.com, Medscape.com.
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