I feel fine after three days of 875 mg twice daily. Can I keep the rest for winter?
Fourteen tablets is a week, not a sample
Feeling better on day three is the usual path, not a green light to stop. The US amoxicillin label tells patients that early relief is common and that the pack should still be taken as written. Skip doses or cut the course and two things happen: this infection is more likely to rebound, and surviving bacteria are more likely to shrug at the next penicillin.
A twice-daily week of 875 mg is a common adult pack for a bacterial sinus, dental, or chest job. It is not a universal length. Group A strep is labelled for at least ten days, to cut the risk of rheumatic fever. Some files run 48 to 72 hours past the last fever. Count what was prescribed, not what a blog counted.
Amoxil 875 mg lock
This site's lock875 mg tablet, usually every 12 hours
A week at that paceFourteen tablets if the label says 7 days
Strep throatOften at least 10 days, not a 7-day leftover plan
Stop now ifHives, swell, wheeze, trouble breathing
Never forColds and other viruses
Do not bank leftovers. Next time may be viral or a different drug. Unused 875 mg tablets belong at a pharmacy take-back, not in a mug by the kettle.
Sharing two tablets with a partner who 'has the same thing' is the same error in a second body. You do not know the bug. You do not know their allergy card. You do not know their kidneys.
If the bottle says ten days, finish ten days. Your label wins if the count is not fourteen.
875 mg lives on the twelve-hour card
Severe sinus, dental, or chest infections often use 875 mg every 12 hours, or 500 mg every 8 hours. Milder ear, skin, or urine jobs may sit on 500 mg every 12 hours. This site locks the 875 mg tablet. Your bottle is the one that counts.
The 875 mg tablet was studied at the start of a light meal. Take it with breakfast and with an evening plate if that settles the gut. Food is not forbidden.
If glomerular filtration is under 30 mL/min, the label says do not use the 875 mg tablet. Lower strengths on a wider interval are the renal file.
Swallow the tablet. The 875 mg tablet is scored on some US products. That score is not an invitation to invent a 437.5 mg plan. If a clinician wants a different strength, they write a different strength.
Missed one? Take it when you remember unless the next 875 mg is nearly due. Then skip the missed tablet. Do not stack two 875 mg tablets to 'catch up.' That mostly buys nausea.
Probenecid holds amoxicillin in the blood longer. Allopurinol raises the chance of a rash. Warfarin users need the INR watched. These are clinic notes, not reasons to stop a needed course on your own.
If the infection is H. pylori, the amoxicillin piece is often 1 gram twice daily with other drugs for 14 days. That is a different card. Do not remix it with a leftover 875 mg sinus pack.
The late flat rash is often mono
Known mononucleosis is a reason not to start this tablet. A high share of people with active Epstein-Barr who take amoxicillin get a wide, red, often non-itchy rash. The label tells us not to give amoxicillin in that setting.
The trap is a young adult treated for 'strep' who was actually mono. The rash appears days in. Everyone writes 'penicillin allergy' on the card. The immune story is not the same as anaphylaxis. The card then blocks useful penicillins for decades.
Timing helps. Hives in minutes to a couple of hours after tablet one is allergy until proven otherwise. A flat rash on day five with swollen glands and a week of fatigue is a mono pattern until someone checks.
A childhood 'penicillin allergy' that was a day-five flat rash during a long sore throat is a common false label. Skin testing can clear many of those stories. Clearing the label matters. A fake allergy pushes every future prescriber toward broader drugs.
If you already know you have mono, do not start amoxicillin. If someone handed you 875 mg for 'strep' and then the glands and fatigue look like mono, call before the next tablet. Do not finish a pack to be polite.
A late rash still needs a look. I would rather see a photo and a timeline than have you decide 'allergic for life' at the bathroom mirror.
Hives means stop before the next swallow
Amoxicillin is a penicillin. Stop it at the first sign of a real allergic reaction and get help. Hives, widespread itch, swelling of lips or tongue or face, wheeze, or trouble breathing are emergency signs. Dizziness with a sense of the throat closing is the same file. Oral penicillins can still do this. History of penicillin allergy makes it more likely.
Severe skin reactions are on the label too: rash with mucosal sores, peeling, blistering. Stop. Do not take the evening 875 mg 'to finish the day.' Call.
A separate, mostly pediatric warning is drug-induced enterocolitis. Protracted vomiting one to four hours after a dose, without a rash or wheeze, can come with pallor, limpness, or later diarrhea. Stop the drug. That is not a wait-and-see tummy ache.
Read the reaction
- Hives, facial or tongue swelling, wheeze, or trouble breathing - stop and use emergency care.
- Peeling, blistering, or sores in the mouth - stop and call the same day.
- Protracted vomiting 1 to 4 hours after a dose, especially in a child - stop and get reviewed.
A true penicillin story also changes the next drugs. Some people with penicillin allergy react to related cephalosporins. Write the reaction in the chart: what you took, how fast it started, hives versus a flat rash, breathing or not. 'I think I am allergic' without a story is how people get the wrong broad antibiotic for twenty years.
Stomach upset is common. It is not anaphylaxis. Call if you cannot keep fluids down.
If you have ever had Stevens-Johnson or a blistering penicillin reaction, this tablet is closed. Do not trial a 'tiny piece' at home.
Watery stools can arrive after the last tablet
Loose stool during a course is common. The label also warns about Clostridioides difficile. Nearly every antibacterial can clear enough normal colon flora that C. diff overgrows. Severity runs from nuisance diarrhea to colitis. It can start on the pack or two or more months after the last 875 mg tablet.
Watery stools several times a day, blood, fever, or bad cramping are a same-day call, not a yogurt experiment. This can show up when you have already filed the antibiotic as finished. That delay is why people miss it.
A single 875 mg course is not the highest-risk class for C. diff. I would rather hear about late watery diarrhea the same day. Waiting because the pack is finished is how people miss it.
Do not start an anti-diarrhea tablet as the first move if the picture is watery, frequent, and late. That can keep toxin against the gut wall. Call first.
Yeast on the tongue or in the vagina is another leftover of a wide penicillin. Unpleasant. Treatable. Mention it rather than adding leftover cream from a prior year.
One or two loose stools during the week, without fever or blood, often settle when the course ends. That is the common gut tax. It is still worth a line in the mailbag if it is new for you.
Colds do not read this label
Colds, flu, and most sore throats are viruses. Amoxicillin kills bacteria by wrecking the wall they build as they grow. Viruses do not build that wall. The tablet cannot reach them. The US counseling text uses the common cold as the example. I use the same example in Lyon.
Covid, RSV, and a winter 'chestiness' that is still viral sit in the same bin. You can feel wretched and still have no bacterial target. An 875 mg tablet then adds loose stool, a rash risk, and a disturbed gut to an illness that was already going to take its week.
Where the tablet earns its keep: susceptible strep throat, many ear and sinus infections, some skin infections, some urine infections, dental abscesses, some pneumonias, and H. pylori as part of a combination. A clinician reaching for 875 mg should be able to say which of those they think you have.
A swab or a clear exam finding is how a bacterial job gets named. Strep can be tested. An ear can be looked at. A dental abscess has a story. 'Everyone in the office is coughing' is not a culture.
Pressuring a clinician for 875 mg 'just in case' is how fourteen tablets get wasted and how guts get stirred for nothing. Ask for the reason. If the reason is viral watchful waiting, take the tea and the time off, not the penicillin.
Children get weight-based liquid, not a snapped adult 875 mg tablet. Never guess a child's dose from your pack. Never send a leftover tablet to school 'in case it turns bacterial.'
Leftovers stay out of the kitchen drawer
One forgotten 875 mg tablet is not a crisis if the rest of the course is steady. A pattern of missed evenings is. Twelve-hour spacing is how the blood level stays useful. Cluster the tablets at 10 a.m. and 10 p.m. if that is the pair you will actually keep.
When the prescribed count is finished, stop. Do not extend 'a few extra days just in case.' Do not start a second packed week because a cough is still there. A leftover cough after a bacterial job can be viral, reactive, or a sign you need a different look, not a ghost refill.
Put unused tablets in a take-back bin. A kitchen drawer is how a child finds an 875 mg tablet, and how a roommate treats their own virus.
Alcohol has no labelled chemical clash with amoxicillin the way metronidazole does. A glass will not cancel the 875 mg tablet. It still dries you out and wrecks the sleep that is doing the recovery work. If the gut is already loose, wine makes that louder. Keep it small or skip it until the pack is done.
Date the file when the last tablet is gone: what you took, how many days, any rash, any late diarrhea. The next clinician can use that card. The longer interaction list sits on the amoxicillin cabinet note.