Can I still take iron supplements for blood deficiency while having a cold?

Dec 04, 2025 Source: Cainiu Health
Dr. Ren Yi
Introduction
If cold symptoms are mild (only slight nasal congestion, no fever) and the person does not usually experience gastrointestinal discomfort such as nausea or bloating when taking iron supplements, iron therapy for anemia can be continued under a doctor's guidance. In such cases, iron absorption is minimally affected, and continuous supplementation helps prevent interruption of anemia improvement due to stopping medication, without significantly worsening cold symptoms.

Generally, if cold symptoms are mild and there is no gastrointestinal discomfort, it is acceptable to take iron supplements for anemia as directed by a physician. However, if symptoms are severe or the gastrointestinal system is weak, iron supplementation is not recommended temporarily. If in doubt, it is advisable to consult a healthcare provider in advance. Detailed analysis is as follows:

If cold symptoms are mild (such as slight nasal congestion without fever) and the individual normally takes iron supplements without experiencing gastrointestinal side effects like nausea or bloating, iron supplementation may be continued under medical guidance. In such cases, the body's absorption of iron is minimally affected, and continuous intake helps prevent interruption in anemia improvement without significantly worsening cold symptoms.

If cold symptoms are severe (accompanied by high fever, sore throat, vomiting, diarrhea) or if the person has inherently weak gastrointestinal function and tends to experience discomfort when taking iron, iron supplementation should be temporarily avoided. During severe colds, digestive and absorptive functions are impaired, and iron supplements may increase gastrointestinal burden, triggering or exacerbating symptoms such as nausea and abdominal pain. Additionally, high fever can reduce iron absorption efficiency, so treating the cold should take priority.

When taking iron supplements during a cold, ensure a 1–2 hour interval between iron and cold medications to avoid potential interactions. If iron supplementation is paused, resume promptly after recovery from the cold. Discontinue use immediately and seek medical attention if severe gastrointestinal discomfort occurs or cold symptoms worsen.