Diarrhea, headache, nausea or vomiting, dizziness, trouble sleeping, or rash may occur as generic Linezolid drug side effects, as well as easy bruising or bleeding, severe headache, severe dizziness, vision changes, tingling or numbness of hands/feet, fever, persistent sore throat, unusual fatigue. Use of this medication for extended or repeated periods may lead to a secondary infection (e.g., oral or vaginal fungal infection). Contact your local doctor if you observe white patches in your mouth, a change in vaginal discharge or other new symptoms.