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This is generally not a problem when taking tetracycline for two weeks or less.

People taking tetracycline for longer than two weeks should ask their doctor about vitamin and mineral supplementation. Taking 500 mg vitamin C simultaneously with tetracycline was shown to increase blood levels of tetracycline in one study. Several cases of excessive bleeding have been reported in people who take antibiotics.

This side effect may be the result of reduced vitamin K activity and/or reduced vitamin K production by bacteria in the colon. One study showed that people who had taken broad-spectrum antibiotics had lower liver concentrations of vitamin K2 (menaquinone), though vitamin K1 (phylloquinone) levels remained normal. Several antibiotics appear to exert a strong effect on vitamin K activity, while others may not have any effect. Therefore, one should refer to a specific antibiotic for information on whether it interacts with vitamin K. Doctors of natural medicine sometimes recommend vitamin K supplementation to people taking antibiotics. Additional research is needed to determine whether the amount of vitamin K1 found in some multivitamins is sufficient to prevent antibiotic-induced bleeding. Moreover, most multivitamins do not contain vitamin K.

A common side effect of antibiotics is diarrhea , which may be caused by the elimination of beneficial bacteria normally found in the colon.

A nonpathogenic yeast known as Saccharomyces boulardii has been shown in two double-blind studies to decrease frequency of diarrhea in people taking amoxicillin as well as other penicillin-type drugs compared to placebo.

There were overall few people in these studies using amoxicillin specifically, so there is no definitive proof that Saccharomyces boulardii will be beneficial for everyone when it is combined with amoxicillin. The studies used 1 gram of Saccharomyces boulardii per day.

A separate double-blind study found that taking a combination of Lactobacillus acidophilus and Lactobacillus bulgaricus, two normal gut bacteria, with amoxicillin did not protect children from developing diarrhea.

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The diarrhea experienced by some people who take antibiotics also might be due to an overgrowth of the bacterium Clostridium difficile , which causes a disease known as pseudomembranous colitis. Controlled studies have shown that supplementation with harmless yeast—such as Saccharomyces boulardii or Saccharomyces cerevisiae (baker's or brewer's yeast)—helps prevent recurrence of this infection. Treatment with antibiotics also commonly leads to an overgrowth of yeast (Candida albicans) in the vagina ( candida vaginitis ) and the intestines (sometimes referred to as "dysbiosis").

Controlled studies have shown that Lactobacillus acidophilus might prevent candida vaginitis. Tooth discoloration is a side effect of minocycline observed primarily in young children, but it may occur in adults as well. Vitamin C supplementation may prevent staining in adults taking minocycline.

A common side effect of antibiotics is diarrhea , which may be caused by the elimination of beneficial bacteria normally found in the colon. A nonpathogenic yeast known as Saccharomyces boulardii has been shown in two double-blind studies to decrease frequency of diarrhea in people taking amoxicillin as well as other penicillin-type drugs compared to placebo. There were overall few people in these studies using amoxicillin specifically, so there is no definitive proof that Saccharomyces boulardii will be beneficial for everyone when it is combined with amoxicillin.

The studies used 1 gram of Saccharomyces boulardii per day.

A separate double-blind study found that taking a combination of Lactobacillus acidophilus and Lactobacillus bulgaricus, two normal gut bacteria, with amoxicillin did not protect children from developing diarrhea.

The authors of the study point out some problems such as the parents' inability to consistently define diarrhea.

However, at this time, it is unknown if lactobacillus products will reduce diarrhea due to amoxicillin. Controlled studies have shown that taking other probiotic microorganisms—such as Lactobacillus casei or Bifidobacterium longum —also helps prevent antibiotic-induced diarrhea. The diarrhea experienced by some people who take antibiotics also might be due to an overgrowth of the bacterium Clostridium difficile , which causes a disease known as pseudomembranous colitis. Controlled studies have shown that supplementation with harmless yeast—such as Saccharomyces boulardii or Saccharomyces cerevisiae (baker's or brewer's yeast)—helps prevent recurrence of this infection. In one study, taking 500 mg of Saccharomyces boulardii twice daily enhanced the effectiveness of the antibiotic vancomycin in preventing recurrent clostridium infection.

Therefore, people taking antibiotics who later develop diarrhea might benefit from supplementing with saccharomyces organisms. Treatment with antibiotics also commonly leads to an overgrowth of yeast (Candida albicans) in the vagina ( candida vaginitis ) and the intestines (sometimes referred to as "dysbiosis"). Controlled studies have shown that Lactobacillus acidophilus might prevent candida vaginitis. When taken with amoxicillin, bromelain was shown to increase absorption of amoxicillin in humans. When 80 mg of bromelain was taken together with amoxicillin and tetracycline , blood levels of both drugs increased, though how bromelain acts on drug metabolism remains unknown. An older report found bromelain also increased the actions of other antibiotics, including penicillin, chloramphenicol, and erythromycin , in treating a variety of infections. In that trial, 22 out of 23 people who had previously not responded to these antibiotics did so after adding bromelain taken four times per day. Doctors will sometimes prescribe enough bromelain to equal 2,400 gelatin dissolving units (listed as GDU on labels) per day.

This amount would equal approximately 3,600 MCU (milk clotting units), another common measure of bromelain activity.

Khat (Catha edulis) is an herb found in East Africa and Yemen that has recently been imported into the United States. Studies have shown that chewing khat significantly reduces the absorption of ampicillin, which might reduce the effectiveness of the antibiotic.

Therefore, people taking ampicillin should avoid herbal products that contain khat. Taking calcium, iron, magnesium, or zinc at the same time as minocycline can decrease the absorption of both the drug and the mineral. Therefore, calcium, iron, magnesium, or zinc supplements, if used, should be taken an hour 2263 93 pill before or after the drug.

Taking calcium, iron, magnesium, or zinc at the same time as minocycline can decrease the absorption of both the drug and the mineral.

Therefore, calcium, iron, magnesium, or zinc supplements, if used, should be taken an hour before or after the drug.

Berberine is a chemical extracted from goldenseal (Hydrastis canadensis), barberry (Berberis vulgaris), and Oregon grape (Berberis aquifolium), which has antibacterial activity. However, one double-blind study found that 100 mg berberine given with tetracycline (a drug closely related to doxycycline) reduced the efficacy of tetracycline in people with cholera.

In that trial, berberine may have decreased tetracycline absorption.

Another double-blind trial found that berberine neither improved nor interfered with tetracycline effectiveness in cholera patients. Therefore, it remains unclear whether a significant interaction between berberine-containing herbs and doxycycline and related drugs exists.

Several cases of excessive bleeding have been reported in people who take antibiotics. This side effect may be the result of reduced vitamin K activity and/or reduced vitamin K production by bacteria in the colon. One study showed that people who had taken broad-spectrum antibiotics had lower liver concentrations of vitamin K2 (menaquinone), though vitamin K1 (phylloquinone) levels remained normal.

Several antibiotics appear to exert a strong effect on vitamin K activity, while others may not have any effect. Therefore, one should refer to a specific antibiotic for information on whether it interacts with vitamin K.

Doctors of natural medicine sometimes recommend vitamin K supplementation to people taking antibiotics.

Additional research is needed to determine whether the amount of vitamin K1 found in some multivitamins is sufficient to prevent antibiotic-induced bleeding. Moreover, most multivitamins do not contain vitamin K.

Amoxil (Amoxicillin) - Drug Interactions, Contraindications, Overdosage, etc. High urine concentrations of ampicillin may result in false-positive reactions when testing for the presence of glucose in urine using CLINITEST ® , Benedict’s Solution, or Fehling’s Solution. Since this effect may also occur with amoxicillin, it is recommended that glucose tests based on enzymatic glucose oxidase reactions (such as CLINISTIX ® ) be used. Following administration of ampicillin to pregnant women, a transient decrease in plasma concentration of total conjugated estriol, estriol-glucuronide, conjugated estrone, and estradiol has been noted.

Carcinogenesis, Mutagenesis, Impairment of Fertility.

Long-term studies in animals have not been performed to evaluate carcinogenic potential. Studies to detect mutagenic potential of amoxicillin alone have not been conducted; however, the following information is available from tests on a 4:1 mixture of amoxicillin and potassium clavulanate (AUGMENTIN). AUGMENTIN was non-mutagenic in the Ames bacterial mutation assay, and the yeast gene conversion assay.