14
May
How Long Does An Allergic Reaction Last For With Medication. Allergic reactions to drugs are usually self-limiting and only last for a few days after the drug is discontinued. Similarly how long does an allergic reaction to sulfa last. 30 years experience Pediatric Allergy and Asthma. Medications that stay in the body for a few days could cause longe.
If it developed over time it will take longer to fade as you have a build up of that medication in your system and you will likely continue to suffer some kind of rash until the medication is completely out of your system. It takes about 1 day in a mild reaction and about 2 weeks in case of a severe reaction. It would also depend on whether it was an immediate allergic reaction or one that developed over time. Most of the time symptoms will appear between 1-2 hours after taking the drug unless you have a more rare delayed type reaction. Rash fever and organ problems begin within 1 to 2 weeks after you start the drug. For most allergic reactions the initial symptoms begin to go away a few hours after the allergen is removed and should be nearly completely gone after 1-2 days.
Less than one week.
Most commonly a majority of people will have. The symptoms of a drug allergy may be so mild that you hardly notice them. It would also depend on whether it was an immediate allergic reaction or one that developed over time. 30 years experience Pediatric Allergy and Asthma Less than one week. If the itchy rash that you have on your arms and hands is hives which would indicate a classic allergic reaction you should see these go away fairly soon. Allergic reactions may last for varying lengths of time.