When something goes wrong with a treatment, the question is almost always the same: what caused it? On this tag page you’ll find short, plain answers — not medical fluff. We look at why side effects start, why drugs stop working, why supplies run out, and why online orders sometimes fail. Each post linked here breaks a cause down so you can act fast and smart.
Drug interactions. Two or more medicines can change how one another works. That might make a drug weaker, stronger, or more toxic. Always check new meds against what you already take — prescription, OTC, and supplements.
Incorrect dose or schedule. Taking too much, too little, or skipping doses can trigger side effects or let the illness keep going. Small timing changes (morning vs night) can matter for some drugs.
Allergic reactions and sensitivities. A new rash, swelling, or breathing trouble after a dose likely means allergy. Stop the drug and seek care if breathing or consciousness is affected.
Underlying illness or new condition. Sometimes symptoms blamed on a drug are actually caused by a disease that was missed or that evolved. A fresh infection, worsening liver/kidney function, or new metabolic issues often change how medications act.
Counterfeit or poor-quality drugs. Buying from unverified online sellers can bring counterfeit pills that don’t work or are dangerous. Check pharmacy legitimacy and look for reviews and contact info.
Supply chain and manufacturing problems. Drug shortages usually come from factory shutdowns, raw material scarcity, regulatory holds, or sudden demand spikes (outbreaks, guideline changes). When a brand runs out, alternatives may be available — we list safe swaps in several posts.
1) Stop or pause the suspect medicine only if the reaction is mild and you know how to do it. For severe reactions (trouble breathing, fainting, chest pain), get emergency help.
2) Make a clear timeline: when the drug started, when symptoms began, any new foods, alcohol, or supplements. This helps your clinician pinpoint the cause.
3) Talk to a pharmacist. They’re great at spotting interactions, dose issues, and fake products. Ask about alternatives if your drug is out of stock.
4) Ask for simple tests. Blood work can show kidney/liver trouble or drug levels. Microbiology or resistance testing matters when infections don’t respond.
5) Report problems. Let your prescriber and pharmacy know. Reporting adverse events helps protect others and can reveal wider safety issues.
The articles tagged "causes" here cover real-life examples: why prednisolone causes certain side effects, what makes sulfasalazine nausea happen, how Plaquenil shortages affect patients, and why online pharmacy buys sometimes go wrong. Read the short guides to get practical fixes and what questions to ask your healthcare team.
Want help with a specific issue? Pick the post that matches your problem and follow the step-by-step advice there. If you’re unsure, start with your pharmacist — they catch most causes quickly and keep things simple.
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