Forensic Medicine Signs and symptoms usually develop within 15-30 minutes of strychnine ingestion. What is the fatal dose of strychnine? A 10-15 mg B 20-40 mg C 60-100 mg D 100-120 mg 💡 Explanation Signs and symptoms usually develop within 15-30 minutes of strychnine ingestion. What is the fatal dose of strychnine? ✓ Correct Answer: C. 60-100 mg