Does Iron Pills Make You Sick?

Iron is best absorbed on an empty stomach. Yet, iron supplements can cause stomach cramps, nausea, and diarrhea in some people. You may need to take iron with a small amount of food to avoid this problem.

What are the side effects of taking iron pills?

It can cause side effects such as stomach upset and pain, constipation or diarrhea, nausea, and vomiting. Taking iron supplements with food seems to reduce some of these side effects. However, food can also reduce how well the body can absorb iron. Iron should be taken on an empty stomach if possible.

How long after taking iron Do you feel sick?

Most people begin to feel better after taking ferrous sulfate for 1 week, but it may take up to 4 weeks to take full effect. Common side effects include feeling or being sick, constipation and diarrhoea.