What symptoms occur if too little warfarin is taken?
Disease description:
I have congenital heart disease, and my doctor prescribed two warfarin tablets daily. Recently, I’ve been feeling much better and am considering reducing the dosage. What symptoms might occur if I take less warfarin?
Doctor's answer (1)
Dr. Tian Hongbo
Taking too little warfarin may lead to the following symptoms:
Warfarin inhibits blood clotting; therefore, an insufficient dose increases the risk of bleeding. Common bleeding manifestations include gingival bleeding, epistaxis, gastrointestinal bleeding, rectal bleeding, and subcutaneous hemorrhage.
Warfarin can suppress gastric acid secretion; inadequate dosing may result in digestive issues such as dyspepsia, heartburn, and gastroesophageal reflux.
It may affect blood glucose and lipid levels; insufficient dosing could potentially cause weight loss.
In certain cases, markedly inadequate warfarin dosing may impair cardiac function, leading to bradycardia.
As an anticoagulant, insufficient warfarin dosing may enhance coagulation activity, thereby increasing the risk of thromboembolic events—such as cerebral embolism and pulmonary embolism.
