| Symptoms associated with this syndrome may be worsened in patients who are receiving sympatholytic agents such as clonidine. |
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| Constipation, nausea and gastric upset are also associated with the sympatholytic effects of these drugs. |
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| Taurine, a sulfur-containing amino acid, has been reported to have antihypertensive and sympatholytic activity. |
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| These authors feel that, at the present time, the evidence seems insufficient to support the use of peripheral sympatholytic procedures in the routine management of pain. |
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