- August 15, 2023
- By Dr. Sarah Thompson, PharmD
Amoxicillin is commonly chosen when susceptible bacteria are responsible for an infection, because this semisynthetic penicillin interferes with bacterial cell-wall synthesis and kills actively multiplying organisms across a broad range of approved bacterial conditions. Developed through the semisynthetic penicillin research program at Beecham Research Laboratories and introduced in 1972, Amoxicillin became one of the most established oral antibiotics in clinical practice because of its antibacterial activity and reliable absorption. The World Health Organization continues to include Amoxicillin in its Model List of Essential Medicines, while prescribing guidance emphasizes its use for infections that are proven or strongly suspected to have a bacterial cause.
What does Amoxicillin help with?
The drug is effective against a large number of pathogenic microorganisms. The list of its use is wide:
- ear, nose, and throat diseases (pharyngitis, otitis, sinusitis, etc.);
- exacerbation of chronic bronchitis, pneumonia;
- diseases of the gastrointestinal tract (chronic bacterial gastritis, cholecystitis, stomach ulcer, etc.);
- issues of the genitourinary system (urethritis, gonorrhea, cystitis);
- infections of the blood, internal organs (endocarditis, meningitis, etc.).
The active component of the drug is also a lethal weapon against bacteria that are localized in the joint cavity. That is why Amoxicillin is often prescribed to individuals with reactive, infectious, post-traumatic, and purulent arthritis.
Which Doses and Forms Are Available in Canada?
Amoxicillin is supplied in Canada in several oral dosage forms, including capsules and liquid formulations prepared from powder or granules for suspension. Amoxicillin is the active medicinal ingredient, while the inactive ingredients used to form the capsule, powder, or finished liquid vary by manufacturer and product. These may include fillers, binders, lubricants, flavoring agents, and components of the capsule shell.
Liquid amoxicillin is especially useful when the prescribed dose needs to be measured more precisely, including weight-based pediatric dosing. Canadian Pharmacy Spot may therefore supply either a solid oral product or a suspension formulation when it matches the prescription and the product is available for dispensing.
The exact product supplied can vary by pharmacy and manufacturer, but marketed amoxicillin formulations in Canada include several commonly prescribed strengths:
| Strength | Dosage Form | How It Is Used |
|---|---|---|
| 125 mg/5 mL | Oral suspension | Allows smaller and weight-based doses, particularly for children |
| 250 mg/5 mL | Oral suspension | Provides a more concentrated liquid option when larger doses are prescribed |
| 250 mg | Capsule | Used when the treatment regimen requires a lower solid oral dose |
| 500 mg | Capsule | Commonly used in adult antibiotic treatment regimens |
These strengths refer to amoxicillin as a single active ingredient. Products that combine amoxicillin with clavulanic acid are separate prescription antibiotics and may be sold in different strengths and dosage forms.
What Determines How Much Amoxicillin You Can Order from a Canadian Pharmacy Spot?
The quantity of amoxicillin supplied in one online order is based primarily on the prescription, not on a standard website purchase limit. Since amoxicillin is a prescription antibiotic in Canada, the authorized treatment regimen establishes how much medication the pharmacy can dispense.
The final quantity generally reflects several parts of the prescription:
- the amoxicillin strength selected by the prescriber;
- the number of doses taken each day;
- the prescribed length of treatment;
- the number of capsules or volume of suspension needed to complete the course;
- any dispensing restrictions applied by the pharmacy or provincial pharmacy regulator.
For example, a prescription written for a defined course of 500 mg capsules will normally result in the amount required for that course rather than an unrestricted bulk supply. A Canadian pharmacy operating online follows the same prescription and dispensing standards that apply to its physical pharmacy location. Additional quantities intended for later, unrelated infections would generally require appropriate prescribing authorization instead of being added to the original order automatically.
What are the restrictions?
The primary contraindication to taking the drug is the individual intolerance to its active component. The restrictions also include:
- intolerance of any other antibacterial agent of the penicillin group;
- genetic issues associated with a malfunction in the metabolism of amino acids in the body;
- acute diseases of the liver, kidneys;
- lymphoblastic leukemia;
- mononucleosis of an infectious nature.
In addition, medical specialists try not to prescribe Amoxicillin to newborns and elderly patients. Allergic reactions (including bronchial asthma) and diseases of the gastrointestinal tract (especially colitis during earlier use of antibiotics) should also raise a caution flag.
Attention! Part of the active ingredient leaves the body through breast milk, which should be taken into account when prescribing Amoxicillin to a nursing mother.
Usage and dosage
Amoxicillin is intended for oral administration. Eating does not affect the absorption of this medication. Therefore, the tablet can be taken regardless of the meal.
Treatment can be started with intravenous administration at the doses recommended for this route of administration and continued with oral Amoxicillin tablets.
When determining the dose of this medicine for a specific illness, the following should be kept in mind:
- the type of the suspected pathogen and the characteristic profile of sensitivity/resistance to antibacterial agents for this pathogen;
- severity and localization of the infectious process;
- age, body weight, and state of kidney function of the patient.
The treatment duration should be determined based on the type of infection and individual reactions of the individual to the drug. In general, it should be as short as possible. Some infections, though, require prolonged therapy with Amoxicillin.
Attention! It is strongly not recommended to increase or reduce the dose on your own – you should first consult with your doctor.
Side effects of Amoxicillin
One of the likely adverse effects is allergic reactions that include urticaria, erythema, angioedema, rhinitis, and conjunctivitis. In rare cases, it can result in fever, joint pain, and eosinophilia, while in isolated cases the allergic reaction can go as far as anaphylactic shock.
Superinfections can arise as a result of chemotherapeutic activity, especially in individuals with chronic conditions or low body resistance.
With prolonged use in high doses, the individual might experience dizziness, confusion, depression, and convulsions.
Other side effects, such as nausea, vomiting, anorexia, diarrhea, constipation, stomatitis, and rarely hepatitis, colitis, allergic reactions, interstitial nephritis, and disorders of hematopoiesis, are typically seen when combined with other specific medications. Accordingly, you should let the medical specialist who prescribes the medication know about your current medications.
Overdose
Symptoms of an overdose are quite typical and include nausea, vomiting, diarrhea, and disturbance of water and electrolyte balance (as a result of vomiting and diarrhea).
Gastric lavage, absorbents, saline laxatives, hemodialysis, and drugs to maintain water and electrolyte balance are all possible options to deal with an overdose.
Frequently Asked Questions
Is it possible to use Amoxicillin and drink alcohol?
Antibiotics and alcohol are incompatible things. Combining these substances can bring on severe toxic damage, up to death. Consequences of drinking alcohol during treatment include:
- allergies;
- intoxication of the body;
- malfunctions of the liver;
- disturbances in the work of the heart, failure of the heart rhythm;
- migraine, tinnitus.
Alcohol is a weak analgesic that dulls the pain for a while. Accordingly, the individual may find that the painful symptoms went away and reduce the recommended dose. In this case, the infection is able to penetrate even deeper. As a result, the disease will develop into a chronic form.
Attention! You can take alcoholic beverages in small quantities only 7 days after the end of antibacterial treatment.
Can pregnant women take it?
It is not recommended to be treated with Amoxicillin in the first 12 weeks of pregnancy, since the baby is developing vital systems and organs at this time. Starting from the second trimester, the risk of complications in the fetus during antibiotic therapy decreases. The doctor would select the dose of the drug for the expectant mother based on her individual condition.
Does the drug influence the ability to drive vehicles and work with mechanisms?
Individuals should be extremely cautious when driving a car or engaging in other potentially hazardous endeavors during the treatment period. This is due to the likelihood of adverse nervous system responses such as dizziness, agitation, and changes in behavior.
When is the medication not effective?
There are some restrictions when using Amoxicillin, which is due to its bactericidal action. Since it destroys bacteria, it is undesirable to use it for infections, the pathological effect of which is associated with endotoxins.
For example, when an individual is sick with cholera, the pathogens produce a toxin. It is the toxin that causes severe dehydration in this infection. When the pathogen is destroyed, more cholera toxin is formed and intoxication grows. Therefore, in such infections, it is desirable to use bacteriostatic antibiotics, which do not destroy bacteria, but prevent their reproduction. This allows to prevent intoxication.
Of course, no antibiotic works against viruses. Treating the common cold with antibiotics is also the most popular medical misconception in recent years, which leads to antibiotic resistance. If a bacterial infection later joins the viral disease, the antibiotic will no longer be able to fight the bacteria.