Approved by the FDA since 2018, Fostamatinib is used to treat a bleeding condition called “chronic immune thrombocytopenia”, which in turn is the result of a lack of platelets in the blood. So, basically what Fostamatinib does is increase platelets in the patient’s blood. According to drugs.com, this medication can sometimes raise the blood pressure to dangerous levels. Plus, it may even cause liver problems, severe diarrhea, and infections. For this reason, you must contact your doctor immediately when you experience any of the following side effects: headaches, chest pain, shortness of breath, severe diarrhea, stomach pain, fever, or sore throat. As for the common side effects of Fostamatinib, they include rash, dizziness, and cold symptoms. Bear in mind that you should steer clear of this drug during pregnancy as it could harm the fetus. And if you’re not pregnant, using effective birth control is highly recommended. It is also worth noting that you should not breastfeed while taking Fostamatinib. On a side note, you may take this medication with or without food.