What Causes Petechiae?

Reaction To Medication

Petechiae can sometimes develop as a reaction to a medication. The condition will typically resolve or at least stop spreading if individuals stop taking the medication. Antibiotics like penicillin and nitrofurantoin can cause petechiae, but it's important to finish the entire regimen, unless a doctor recommends otherwise. Failing to finish a course of antibiotics can make a bacterial infection return with an immunity to medication. The antidepressant desipramine and anticonvulsant carbamazepine have both been known to cause petechiae. Certain blood thinners like heparin and warfarin can cause the condition, as can the heart rhythm regulator atropine. Naproxen and indomethacin can also lead to petechiae, as can the sedative chloral hydrate. Even if individuals think one of these medications is causing their symptoms, they should still call their doctor to make sure there's not a more serious underlying cause.

Read more about the various causes of petechiae now.