Some of these side effects may occur when taking this medication; they are as follows; Flushing of the face and neck along with warmth, headache, itching, burning, sweating, chills, or tingling may occur within 2-4 hours of taking this medication. Flushing may persist for a few hours after use. These effects should improve or go away as your body adjusts to the medication. Dizziness, stomach upset, heartburn, nausea, vomiting, and diarrhea may also occur. However, if these symptoms do persist or worsen, it is best then to speak with your doctor.
Tell your doctor right away if you have any serious side effects, including: severe dizziness/fainting, fast/irregular heartbeat, severe headache (migraine), unusual joint pain, swelling of legs/arms, vision problems, severe stomach/abdominal pain, black stools, easy bruising/bleeding, unexplained muscle pain/tenderness/weakness, persistent nausea/vomiting, signs of kidney problems (such as change in the amount of urine), dark urine, vomit that looks like coffee grounds, yellowing eyes/skin.
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.