How long after rituxan (rituximab) treatment will the side effects go away?

Most likely.: What side effects do you speak of? Most side effects of Rituximab occur during the infusion itself; I have very few folks complain of anything afterwards except maybe fatigue (that is if they receive Rituximab by itself). It does suppress the b lymphocytes for months but usually that translates into nothing. Patients who have had heart pain or irregular heartbeats in the past may experience .Reed.

Need more info: Rituxan (rituximab) is generally a well tolerated medication, but like most meds can have side effects. Depending of the side effects and person, time for side effect duration may vary.