17
May
How Long Does Medication Allergic Reaction Last. Typically hives due to a medication will last for only a few days. People with severe reactions may take a long time to get better especially if they are elderly or have other medical conditions. Less than one week. It should probably fade fairly quickly if it was a first time use reaction.
Less than one week. Pledge is right. You may have an allergic reaction the next time. Can last days to weeks. It can take two to six weeks for symptoms to appear after starting a new drug. Itching usually goes away within a week.
But lesions from rash can last several weeks before they completely fade.
Typically hives due to a medication will last for only a few days. It should probably fade fairly quickly if it was a first time use reaction. They may take a few hours to a few days to disappear. If the exposure to the allergen continues such as during a spring pollen season allergic reactions may last for longer periods such as a few weeks to months. Less than one week. Most of the time symptoms will appear between 1-2 hours after taking the drug unless you have a more rare delayed type reaction.