Source-cited guides to the medicines used for everyday conditions — what's available over the counter, what a doctor may prescribe, how to choose, and when to seek care. We cite the FDA, NHS and MedlinePlus, and never tell you to self-prescribe. Not medical advice.
A sore throat is almost always caused by a virus (like a cold or flu) and gets better on its own within about a week, so treatment is mostly self-care to relieve pain — fluids, rest, and over-the-counter pain relievers or soothing lozenges. Antibiotics don't help a viral sore throat; they're only useful for the minority of cases caused by bacteria such as strep, which a clinician must diagnose with a test.
Most allergies (hay fever / allergic rhinitis, hives, and itchy, watery eyes from pollen, dust, mold, or pet dander) are managed with self-care and over-the-counter medicines. The mainstays are non-drowsy antihistamines for sneezing, itching, and runny nose, and steroid nasal sprays — which MedlinePlus calls the single most effective treatment for allergic rhinitis — for nasal congestion and stuffiness.
The common cold is a viral infection that almost always clears on its own in about 1–2 weeks, so treatment is self-care: rest, fluids, and over-the-counter medicines aimed at easing specific symptoms. There is no medicine that cures a cold, and antibiotics do not help because the illness is caused by a virus, not bacteria.
Most sinus infections (sinusitis) are caused by a virus and clear up on their own within about 2–3 weeks, so treatment is usually self-care to relieve symptoms — pain relievers, saline rinses, and decongestants — rather than antibiotics. Antibiotics are reserved for the smaller number of infections that are bacterial, and those require a doctor.
A urinary tract infection (UTI) is a bacterial infection, so the actual cure is almost always a short course of prescription antibiotics from a clinician — over-the-counter products only ease symptoms while you arrange treatment. Simple bladder infections are very treatable, but a UTI is not a self-cure condition: see a pharmacist or doctor rather than relying on OTC products alone.
Most headaches — especially tension-type headaches — are not serious and can be managed at home with rest, fluids, and an over-the-counter pain reliever. The mainstay of treatment is acetaminophen or an NSAID (ibuprofen, naproxen, or aspirin); recurring or severe headaches such as migraine may need prescription medicines from a doctor.
For most healthy people the flu is self-limiting and managed at home with rest, fluids, and over-the-counter medicines that ease fever, aches, and cough — there is no OTC cure that kills the virus. Prescription antiviral drugs can shorten illness by about a day but a doctor reserves them mainly for people who are very sick or at high risk of complications.
Occasional heartburn and acid reflux are usually self-treatable with lifestyle changes and over-the-counter medicines that either neutralize stomach acid or reduce how much acid the stomach makes. Frequent, persistent, or severe reflux (GERD) may need a doctor-prescribed acid-reducing course or further evaluation.
Most migraine attacks can be managed at home with rest in a quiet, dark room and over-the-counter pain relievers, especially when taken early in an attack. There's no cure, so treatment focuses on relieving symptoms during an attack and, for frequent or severe migraines, prescription medicines to stop attacks fast or prevent them.
Occasional constipation is almost always self-care: most people get better by drinking more fluids, gradually adding fiber, staying active, and—if needed—using an over-the-counter laxative, with the most common type (bulk-forming fiber) recommended to try first. Laxatives are meant for short-term use; persistent or severe symptoms should be checked by a clinician.
A runny nose is almost always self-care territory: it's usually caused by a common cold or allergies and clears on its own within about 1–2 weeks. Treatment aims at drying up or thinning the discharge with saline rinses, an oral decongestant, or — when allergies are the cause — an antihistamine or steroid nasal spray.
A toothache is usually a sign of a dental problem (most often a cavity, infection, or irritation around a tooth) and should be assessed by a dentist — but while you wait for an appointment, over-the-counter pain relievers, a topical numbing gel, and simple home care can ease the pain. Painkillers only treat the symptom; the underlying tooth problem still needs professional treatment to keep it from getting worse.
Most short-term (acute) diarrhea is caused by a viral or food-borne bug and clears on its own within about 5 to 7 days, so treatment is mainly self-care: replacing lost fluids and salts to prevent dehydration, with optional over-the-counter medicines for symptom relief. Antibiotics or other prescription drugs are reserved for specific causes (such as a confirmed bacterial infection) and need a doctor.
Most coughs come from a cold, flu, or another viral infection and clear up on their own within a few weeks (the NHS notes a cough usually settles within about 3 to 4 weeks), so the goal is usually self-care and symptom relief — rest, fluids, and honey help, and over-the-counter cough medicines can make you cough less but won't cure the cough. The right product depends on whether your cough is dry (suppressant) or chesty/productive with mucus (expectorant).
Nausea is usually short-lived and can be managed at home with rest, fluids, and simple diet changes, and it often settles on its own within a day or two. Over-the-counter medicines mainly help specific triggers (most reliably motion sickness), while persistent, severe, or unexplained nausea needs a doctor to find and treat the underlying cause.
Motion sickness is usually a short-lived, self-care problem caused when your inner ear, eyes, and body send your brain conflicting signals about movement; it's managed mainly with simple positioning and behavior changes, plus over-the-counter antihistamine tablets taken before you travel, with a doctor's help (such as a scopolamine patch) reserved for severe or frequent cases.
Gas and bloating are usually harmless and treated with self-care — eating smaller meals slowly, cutting back on gas-producing foods and fizzy drinks, and staying active — with over-the-counter anti-gas products and enzyme aids for added relief. Treatment that goes beyond this depends on the underlying cause (such as constipation, lactose intolerance, or IBS).
A vaginal yeast infection (vaginal candidiasis) is usually self-treatable at home when symptoms are mild and you've had one diagnosed before. The mainstay of treatment is an antifungal medicine — an OTC vaginal cream or suppository, or a single prescription oral pill that a doctor can prescribe — and symptoms usually start to ease within a few days, with full treatment courses running up to 7 days. If symptoms don't clear within about a week, or this is your first suspected infection, see a clinician rather than self-treating.
Menstrual cramps (primary dysmenorrhea) are usually managed at home: an over-the-counter NSAID like ibuprofen or naproxen plus heat and gentle activity relieves pain in most people. See a clinician if cramps are severe, getting worse, or don't respond to painkillers, since they can occasionally signal an underlying condition.
Insomnia is usually managed with self-care first: improving sleep habits (sleep hygiene) and, for ongoing problems, cognitive behavioral therapy for insomnia (CBT-I) — which NHS and MedlinePlus describe as the best long-term treatment. Over-the-counter sleep aids and prescription sleeping pills only help short-term and don't cure insomnia.
A poison ivy (oak/sumac) rash is an allergic reaction to the plants' oily sap, and most cases are mild and managed at home: wash the skin and clothing right away, then relieve itching and blistering with over-the-counter creams, soaks, and—if needed—an oral anti-itch antihistamine while the rash runs its course. Severe, facial/genital, or widespread reactions may need prescription steroids from a doctor.
Pink eye (conjunctivitis) is usually a self-limited problem that clears on its own in about 1–2 weeks, especially the common viral type, so most treatment is symptom relief rather than a cure. Care depends on the cause: viral and mild bacterial cases often need only comfort measures, allergic pink eye responds to antihistamine drops and trigger avoidance, and more pronounced bacterial cases may be treated with prescription antibiotic eye drops or ointment.
How we make these: each guide is researched from public health authorities (FDA Drug Facts/ OTC monographs, NHS, MedlinePlus, CDC), independently fact-checked, and links over-the-counter options to their product pages. It is general reference, not medical advice — see our editorial standards.