Amoxicillin can stop the oral typhoid vaccine from working. If you are due to have any vaccinations, make sure the person treating you knows that you are taking this antibiotic. If you are due to have any vaccinations, make sure the person treating you knows that you are taking this antibiotic. I used Amoxicillin for 5 days before when the GP did not know what I had wrong with me, that's standard form GP's as Amoxicillin is a broad spectrum drug but not specific to chest infections. If you can make a test then I think that's a good thing before taking the drugs, but if like me you cant then that's the reason I have clarithromycin for 14 days and no less of a course. Take care x How to tell if the drug is working: The symptoms of your infection should improve. Important considerations for taking amoxicillin Keep these considerations in mind if your doctor prescribes. Below are the main reasons why these antibacterial therapies stop working, why they often fail to work and what you can do to make them work better. Get the right antibiotic. The “standard protocol” followed by most doctors is to prescribe a general or broad-spectrum antibiotic for an infection and “see if it works”. Amoxicillin comes as a capsule, a tablet, a chewable tablet, and as a suspension (liquid) to take by mouth. It is usually taken every 12 hours (twice a day) or every 8 hours (three times a day) with or without food. Amoxicillin can pass into breast milk, but based on a small number of studies, it has not been shown to cause any harm to a baby. Tell your doctor if you are breast-feeding a baby. Tell your doctor if you are breast-feeding a baby. Can you drink alcohol while taking Amoxicillin? Published on February 5th, 2013 There is a common myth that alcohol mixed with antibiotics, such as Amoxicillin, causes interactions. Amoxicillin doesn't stop contraceptive pills working, including the combined pill or emergency contraception. However, if amoxicillin makes you vomit or have severe diarrhoea (6 to 8 watery poos in 24 hours) for more than 24 hours, your contraceptive pills may not protect you from pregnancy. Amoxicillin usually starts working in 24-72 hours showing some improvements if the organism is susceptible to amoxicillin. If you are not noticing any improvent in 3-4 days you should notify your Dr or healthcare provider. You’ve probably heard that when kids take antibiotics, they may experience side effects like diarrhea. But some antibiotics, such as amoxicillin, can lead to a rash.