Tramadol overdose. An overdose of tramadol can cause difficulty breathing and may be fatal. Symptoms of tramadol overdose include: Respiratory depression, Shallow breathing, Narrowed pupils, Extreme weakness, Dizziness, Cold and clammy skin, Slowed heartbeat, Loss of consciousness.

If you think you have overdosed on tramadol, or if someone else may have overdosed, call 911 immediately.