using expired metronidazole gel
Answer: Flagyl is a brand name for the drug metronidazole. The expiration dates on drugs such as Flagyl ensure the strength of the drug. Using an expired drug is unlikely to cause harm but the drug may not work for the intended purpose.nswer: Flagyl is a brand name for the drug metronidazole. The expiration dates on drugs such as Flagyl ensure the strength of the drug. Using an expired drug is unlikely to cause harm but the drug may not work for the intended purpose.