Antibiotic medicines can cause diarrhea, which may be a sign of a new infection. If you have diarrhea that is watery or bloody, stop using clindamycin and call your doctor. Do not use anti-diarrhea medicine unless your doctor tells you to.
Get emergency medical help if you have any signs of an allergic reaction to clindamycin: (hives, difficult breathing, swelling in your face or throat) or a severe skin reaction (fever, sore throat, burning in your eyes, skin pain, red or purple skin rash that spreads and causes blistering and peeling).
Seek medical treatment if you have symptoms of a serious drug reaction that can affect many parts of your body. Symptoms may include: skin rash, fever, swollen glands, flu-like symptoms, muscle aches, severe weakness, unusual bruising, or yellowing of your skin or eyes. This reaction may occur several weeks after you began using clindamycin.
Clindamycin can cause diarrhea, which may be severe or lead to serious, life-threatening intestinal problems. If you have diarrhea that is watery or bloody, stop using clindamycin and call your doctor.
Call your doctor at once if you have:
any change in bowel habits;
severe stomach pain, diarrhea that is watery or bloody;
little or no urination; or
a metallic taste in your mouth (after clindamycin injection).
Common clindamycin side effects may include:
nausea, vomiting, stomach pain;
mild skin rash; or
vaginal itching or discharge;
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
 Clindamycin side effects (more detail)
