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Veclam (Biaxin)

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Veclam is used to treat bacterial infections in many different parts of the body. It is also used in combination with other medicines to treat duodenal ulcers caused by H. pylori. This medicine is also used to prevent and treat Mycobacterium avium complex (MAC) infection.

Other names for this medication:
Abbotic, Biaxin, Clacee, Clarimax, Clariwin, Clarix, Fromilid, Kalixocin, Karin, Klabax, Klerimed, Krobicin, Lekoklar, Macladin, Macrobid, Macrol, Moxifloxacin, Preclar, Synclar, Zeclar

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Cipro, Zitromax, Erythromycin, Azithromycin, Roxithromycin, Erythrocin, Zmax, Zithromax, Ery-Tab, Dificid, Erythrocin Stearate Filmtab, Eryc, EryPed, Erythrocin Lactobionate, Ilosone, PCE Dispertab

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Also known as:  Biaxin.


Veclam (generic name: clarithromycin; brand names include: Maclar / Klaricid / Klacid / Clarimac / Claribid) is used to treat many different types of bacterial infections affecting the skin and respiratory system, including: Strep throat, Pneumonia, Sinusitis (inflamed sinuses), Tonsillitis (inflamed tonsils), Acute middle ear infections, Acute flare-ups of chronic bronchitis.

It also is used to treat and prevent disseminated Mycobacterium avium complex (MAC) infection [a type of lung infection that often affects people with human immunodeficiency virus (HIV)]. It is used in combination with other medications to eliminate H. pylori, a bacteria that causes ulcers.

It also is used sometimes to treat other types of infections including Lyme disease (an infection that may develop after a person is bitten by a tick), crypotosporidiosis (an infection that causes diarrhea), cat scratch disease (an infection that may develop after a person is bitten or scratched by a cat), Legionnaires' disease (a type of lung infection), and pertussis (whooping cough; a serious infection that can cause severe coughing). It is also sometimes used to prevent heart infection in patients having dental or other procedures.

This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.

Veclam works by stopping the growth of or killing sensitive bacteria by interfering with their protein synthesis.


Veclam Filmtab and Veclam Granules may be given with or without food.

Veclam XL Filmtab should be taken with food. Swallow Veclam XL Filmtab whole; do not chew, break or crush Veclam XL Filmtab.

Triple therapy: Veclam Filmtab/lansoprazole/amoxicillin. The recommended adult dosage is 500 mg Veclam Filmtab, 30 mg lansoprazole, and 1 gram amoxicillin, all given every 12 hours for 10 or 14 days.

Triple therapy: Veclam Filmtab/omeprazole/amoxicillin. The recommended adult dosage is 500 mg Veclam Filmtab, 20 mg omeprazole, and 1 gram amoxicillin; all given every 12 hours for 10 days. In patients with an ulcer present at the time of initiation of therapy, an additional 18 days of omeprazole 20 mg once daily is recommended for ulcer healing and symptom relief.

Dual therapy: Veclam Filmtab/omeprazole. The recommended adult dosage is 500 mg Veclam Filmtab given every 8 hours and 40 mg omeprazole given once every morning for 14 days. An additional 14 days of omeprazole 20 mg once daily is recommended for ulcer healing and symptom relief.


Overdose symptoms may include severe stomach pain, nausea, vomiting, or diarrhea.


Store at room temperature between 20 and 25 degrees C (68 and 77 degrees F) away from moisture and heat. Keep container tightly closed. Protect from light. Throw away any unused medicine after the expiration date. Keep out of the reach of children.

Side effects

The most common side effects associated with Veclam are:

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Side effect occurrence does not only depend on medication you are taking, but also on your overall health and other factors.


Discontinue immediately if hepatitis or severe hypersensitivity reactions occurs. Severe renal impairment. Proarrhythmic conditions (eg, hypokalemia, hypomagnesemia, bradycardia); avoid. Myasthenia gravis. History of porphyria; avoid concomitant ranitidine bismuth citrate. Elderly. Pregnancy (Cat.C): usually not recommended. Nursing mothers.

veclam antibiotic

The goals of the present study were to identify the enzyme responsible for metabolism of itopride hydrochloride (itopride) and to evaluate the likelihood of drug interaction involving itopride. In human liver microsomes, the involvement of flavin-containing monooxygenase in N-oxygenation, the major metabolic pathway of itopride, was indicated by the following results: inhibition by methimazole and thiourea, heat inactivation, and protection against heat inactivation by NADPH. When the effects of ketoconazole on the metabolism of itopride, cisapride, and mosapride citrate (mosapride) were examined using human liver microsomes, ketoconazole strongly inhibited the formation of the primary metabolites of cisapride and mosapride, but not itopride. Other cytochrome P450 (CYP) 3A4 inhibitors, cimetidine, erythromycin, and clarithromycin, also inhibited the metabolism of cisapride and mosapride. In an in vivo study, itopride (30 mg/kg), cisapride (1.5 mg/kg), or mosapride (3 mg/kg) was orally administered to male rats with or without oral pretreatment with ketoconazole (120 mg/kg) twice daily for 2 days. The ketoconazole pretreatment significantly increased the area under the serum concentration curve and the maximum serum concentration of cisapride and mosapride but had no significant effect on the pharmacokinetics of itopride. In addition, itopride did not inhibit five specific CYP-mediated reactions of human liver microsomes. These results suggest that itopride is unlikely to alter the pharmacokinetics of other concomitantly administered drugs.

veclam 250 mg granulato

Of a total of 275 S. pyogenes isolates recovered, 105 (38%) were erythromycin-resistant (MIC > or = 1 microgram/ml) [corrected], with 54, 45 and 1% of them carrying mef(A), erm(A) [subclass erm(TR)] and erm(B) gene, respectively. The prevalence of erythromycin-resistant strains was 29 and 42% during the time periods December, 1998, to December, 1999, and January, 2000, to December, 2000, respectively. All erythromycin-resistant isolates were also resistant to clarithromycin and azithromycin. The isolates carrying the erm(A) gene were inducibly resistant to clindamycin. The 275 S. pyogenes isolates had ceprozil MICs < or = 0.032 microgram/ml.

veclam 250 mg

Subjects with severe refractory asthma (n = 45) were randomized to receive clarithromycin (500 mg twice daily) or placebo for 8 weeks.

veclam 250 mg compresse

Clarithromycin decreases CYP3A4 activity and thus gradually inhibits its own metabolism as well as that of coadministered drugs. The aim of this study was to obtain an understanding of the time course of these changes. The plasma concentration-time profiles of clarithromycin and its active metabolite, 14(R)-hydroxy-clarithromycin, in 12 young healthy volunteers after oral administration of a clarithromycin suspension (500 mg twice a day [b.i.d.] for seven doses) were modeled by population pharmacokinetic analysis in the NONMEM program. The nonlinearity of clarithromycin metabolism was considered during model development, and the metabolite disposition kinetics were assumed to be linear. The absorption kinetics of clarithromycin were best described by a Weibull function model. The pharmacokinetics of clarithromycin and its 14(R)-hydroxyl metabolite were adequately described by a one-compartment model each for clarithromycin and its metabolite as well as an inhibition compartment that reflects the autoinhibition of clarithromycin metabolism. Up to 90% of the apparent total clarithromycin clearance (60 liters/h) was susceptible to reversible autoinhibition, depending on the concentration in the inhibition compartment. The proposed semimechanistic population pharmacokinetic model successfully described the autoinhibition of clarithromycin metabolism and may be used to adjust the doses of other drugs that are metabolized by CYP3A4 and that are coadministered with clarithromycin. Simulations showed that for the standard dose of 500 mg b.i.d., no further increase in the level of exposure occurs after approximately 48 h of treatment. For a 1,000-mg b.i.d. dose, the achievement of steady state is expected to take several days and to achieve a 3.6-fold higher level of clarithromycin exposure than the 500-mg b.i.d. dose. This evaluation provides a rationale for safer and more effective therapy with clarithromycin.

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Since CAM resistance and the incidence of side effects are higher in young individuals, it is especially important to select eradication regimens based on testing for antimicrobial susceptibility.

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One hundred and fifty-nine patients with peptic ulcer diseases were prospectively randomized to receive 10 days of lansoprazole, amoxicillin, and clarithromycin (conventional triple therapy) or 5 days of lansoprazole and amoxicillin followed by 5 days of lansoprazole, clarithromycin, and metronidazole (sequential therapy). Post-treatment H. pylori status was determined by the (13) C-urea breath test. Eradication rates, antibiotic resistance rates by agar dilution method, drug compliance, and side-effects were compared.

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Solubility of clarithromycin in aqueous solution was studied at pH 7. PGM viscosities were determined using a falling ball microviscometer. Permeability of clarithromycin through PGM with and without added anti-ulcer drugs at pH 7 was monitored using a microfiltration device and an agar diffusion bioassay.

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Macrolide antibiotics possess a variety of actions other than antimicrobial activities. To determine the effects of long-term administration of clarithromycin (CAM) on the amount and physical properties of sputum in patients with clinical conditions associated with excessive airway secretions, we conducted the present study in a parallel, double-blind, placebo-controlled fashion. Patients were divided into two groups: the first group (n = 16) received CAM (100 mg, twice a day) for 8 weeks, and the second group (n = 15) received placebo. In evaluating airway secretion, the daily amount of expectorated sputum, solid composition, viscoelastic properties (including elastic modulus and dynamic viscosity), and sputum microbiology were assessed. CAM decreased sputum production from 51 +/- 6 to 24 +/- 3 g/day after treatment, whereas placebo had no effect. The bacterial density and sputum flora were unaltered. In the group receiving CAM, the percent solid composition and elastic modulus increased from 2.44% +/- 0.29% to 3.01% +/- 0.20% and 66 +/- 7 to 87 +/- 8 dyne/cm2 (P < 0.05), respectively, but the dynamic viscosity remained unchanged. These results suggest that long-term treatment with CAM reduces the amount of sputum production, probably by inhibiting airway secretions, and increases sputum elasticity.

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All isolates were inhibited by low concentrations of the fluoroquinolones and macrolides tested, with somewhat higher MICs for the fluoroquinolones. Rifampicin was found to be the most active against L. pneumophila isolates in vitro. These data can be used as a reference for the detection of resistance in clinical L. pneumophila isolates and as a setting of clinical breakpoints.

veclam antibiotics

Moraxella catarrhalis is a common pathogen of the human respiratory tract. Multidrug efflux pumps play a major role in antibiotic resistance and virulence in many Gram-negative organisms. In the present study, the role of the AcrAB-OprM efflux pump in antibiotic resistance was investigated by constructing mutants that lack the acrA, acrB, and oprM genes in M. catarrhalis strain O35E. We observed a moderate (1.5-fold) decrease in the MICs of amoxicillin and cefotaxime and a marked (4.7-fold) decrease in the MICs of clarithromycin for acrA, acrB, and oprM mutants in comparison with the wild-type O35E strain. Exposure of the M. catarrhalis strains O35E and 300 to amoxicillin triggered an increased transcription of all AcrAB-OprM pump genes, and exposure of strains O35E, 300, and 415 to clarithromycin enhanced the expression of acrA and oprM mRNA. Inactivation of the AcrAB-OprM efflux pump genes demonstrated a decreased ability to invade epithelial cells compared to the parental strain, suggesting that acrA, acrB, and oprM are required for efficient invasion of human pharyngeal epithelial cells. Cold shock increases the expression of AcrAB-OprM efflux pump genes in all three M. catarrhalis strains tested. Increased expression of AcrAB-OprM pump genes after cold shock leads to a lower accumulation of Hoechst 33342 (H33342), a substrate of AcrAB-OprM efflux pumps, indicating that cold shock results in increased efflux activity. In conclusion, the AcrAB-OprM efflux pump appears to play a role in the antibiotic resistance and virulence of M. catarrhalis and is involved in the cold shock response.

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veclam 250 mg granulato 2017-09-20

Little is known about the antibiotic susceptibility and clinical significance of non-type b capsulated Haemophilus influenzae. We studied the antibiotic resistance patterns, plasmid carriage and clinical features of H. influenzae type f infections in Spain during 1996-2002 Amoklavin 1000 Mg Kullanimi .

veclam 250 mg 2016-06-05

The clinical management of Helicobacter pylori infected patients who failed Erythromycin Ointment Dosage Cats standard eradication therapies remains a challenge.

veclam 250 mg compresse 2016-07-29

Surgical excision is more effective than antibiotic treatment for children with nontuberculous mycobacterial Flagyl For Uti Dose cervicofacial lymphadenitis.

veclam 500 mg claritromicina 2017-02-01

Clarithromycin resistance in Helicobacter pylori is mainly due to A-to-G mutations within the peptidyltransferase region of the 23S rRNA. In the present study, cross-resistance to macrolide, lincosamide, and streptogramin B (MLS) antibiotics (MLS phenotypes) has been investigated for several clinical isolates of H. pylori. Two major types of MLS resistance were identified and correlated with specific point mutations in the 23S rRNA gene. The A2142G mutation was linked Septran Tablets with high-level cross-resistance to all MLS antibiotics (type I), and the A2143G mutation gave rise to an intermediate level of resistance to clarithromycin and clindamycin but no resistance to streptogramin B (type II). In addition, streptogramin A and streptogramin B were demonstrated to have a synergistic effect on both MLS-sensitive and MLS-resistant H. pylori strains. To further understand the mechanism of MLS resistance in H. pylori, we performed in vitro site-directed mutagenesis (substitution of G, C, or T for A at either position 2142 or 2143 of the 23S rRNA gene). The site-directed point mutations were introduced into a clarithromycin-susceptible strain, H. pylori UA802, by natural transformation followed by characterization of their effects on MLS resistance in an isogenic background. Strains with A-to-G and A-to-C mutations at the same position within the 23S rRNA gene had similar levels of clarithromycin resistance, and this level of resistance was higher than that for strains with the A-to-T mutation. Mutations at position 2142 conferred a higher level of clarithromycin resistance than mutations at position 2143. All mutations at position 2142 conferred cross-resistance to all MLS antibiotics, which corresponds to the type I MLS phenotype, whereas mutations at position 2143 were associated with a type II MLS phenotype with no resistance to streptogramin B. To explain that A-to-G transitions were predominantly observed in clarithromycin-resistant clinical isolates, we propose a possible mechanism by which A-to-G mutations are preferentially produced in H. pylori.

veclam 125 mg 2017-02-08

Since the eradication therapy of Helicobacter pylori(H. pylori) for peptic ulcer was Cefixime 400 Mg Cost covered by Japanese health insurance at 2000 November, this therapy has been generalized in Japan. However, some problems have cropped up at the time, for example, emergence of clarithromycin resistant bacterium etc. On the other hand, investigation of relation between H. pylori and gastric cancer is making progress. Uemura, et al. demonstrated H. pylori had an important role for gastric carcinogenesis by the elegant prospective study in 2001. Under the present circumstances, the Japanese society of Helicobacter Research has to reconsider the guideline for eradication therapy. In this paper, we would like to state the present status and problems of eradication therapy of the current guideline for eradication therapy, especially focusing on gastric cancer.

veclam antibiotics 2016-01-15

The primary objective of our study was to obtain susceptibility data for josamycin against Streptococcus pyogenes isolated from patients presenting with upper respiratory tract infections in France. The secondary objective was to characterize the molecular Clavaseptin Antibiotic Dogs mechanism of resistance in macrolide-resistant isolates.

veclam compresse 500 mg 2017-07-03

The advanced macrolides, azithromycin and clarithromycin, and the ketolide, telithromycin, are structural analogs of erythromycin. They have several distinct advantages when compared with erythromycin, including enhanced spectrum of Amobay Medicine activity, more favorable pharmacokinetics and pharmacodynamics, once-daily administration, and improved tolerability. Clarithromycin and azithromycin are used extensively for the treatment of respiratory tract infections, sexually transmitted diseases, and Helicobacter pylori-associated peptic ulcer disease. Telithromycin is approved for the treatment of community-acquired pneumonia. Severe hepatotoxicity has been reported with the use of telithromycin.

veclam 4 mg 2017-10-10

In 18 Megapen Syrup out of the 20 patients (90%) [77-100%, 95%-CI] a negative test result was found in C13-UBT 35-42 days after treatment. The 2 patients who remained H. pylori-positive had a duodenal ulcer.

veclam antibiotic 2015-01-28

Fifty independent isolates Clindacin Etz Kit Reviews of H pylori were obtained by endoscopy-assisted gastric biopsy from patients attending the University of Chile Clinical Hospital, that previously had not been treated with an eradication regime against this bacterium. The minimal inhibitory concentration of each antimicrobial was determined by agar dilution method.

veclam 500 mg 2016-03-26

We first replicated and then validated 2 models, replacing model assumptions with empirical data from a multipayer claims database. Database subjects were 435 commercially insured U.S. patients treated with bismuthmetronidazole- tetracycline (BMT), proton pump inhibitor (PPI)-clarithromycin, or PPI-amoxicillin. Patients met >1 clinical requirement (ulcer disease, gastritis/duodenitis, stomach function disorder, abdominal pain, H pylori infection, endoscopy, or H pylori assay). Sensitivity analyses included only patients with ulcer diagnosis or gastrointestinal specialist care. Outcome measures were: (1) rates of eradication retreatment; (2) use of office visits, hospitalizations, endoscopies, and antisecretory medication; and (3) cost per effectively treated (nonretreated) patient.