A leaked US Embassy (Istanbul) report on the alleged use of a chemical weapon is on Twitter, but not in the UK media so far:http://thecable.foreignpolicy.com/po..._used_in_syria

Experts say the symptoms match the effects of Agent 15, known also by its NATO code BZ, which is a CX-level incapacitating agent that is controlled under schedule 2 of the Chemical Weapons Convention, to which Syria is not a party.
One comment suggested BZ / CX was similar to Mace. CDC says:
BZ toxicity, which might occur by inhalation, ingestion, or skin absorption, is an anticholinergic syndrome consisting of a combination of signs and symptoms that might include hallucinations; agitation; mydriasis (dilated pupils); blurred vision; dry, flushed skin; urinary retention; ileus; tachycardia; hypertension; and elevated temperature (>101ºF).
Link:http://www.bt.cdc.gov/agent/bz/casedef.asp