Lopid may cause some side effects. Go to your doctor if you experience any of these: Extreme pain in stomach (especially after meals), Jaundice, Blurred vision, eye pain, Pain or burning while urinating, Muscle pain, tenderness, or weakness, unusual tiredness, and dark colored urine, Pale skin, unusual bleeding, shortness of breath, Rapid heart rate Less serious side effects may include: Upset stomach, Stomach pain, nausea, vomiting, diarrhea, Headache or dizziness, Joint or muscle torment, Numbness or tingly feeling, Cold indications such as stuffy nose, sneezing, sore throat.