All 60-mgm tablets of prescription drug pms-Phenobarbital used for treating seizure, anxiety and sleep disorders have been recalled, after Health Canada found over-sized tablets of the drug in the Canadian market.

Containing more Phenobarbital than indicated on the label, the tablets pose an accidental overdose hazard that can prove life-threatening. As well, according to Health Canada, those taking a higher-than-recommended overdose, also run the risk of falling into a coma or experiencing cardiac arrest.

Used to treat anxiety, sleep disorders and seizures, symptoms of a possible pms-Phenobarbital overdose may include: " Uncontrolled eye movements. " Lack of muscle co-ordination. " Impaired speech. " Extreme drowsiness. " Decreased breathing and heart rate.

If, you are experiencing any of the above symptoms, you are advised to immediately contact emergency services, while all consumers who have already used the drug, should contact a doctor and return the product to their pharmacist for a replacement.

Consumers must not stop their medication without consulting a health-care professional, as abrupt discontinuation can cause withdrawal symptoms, which include irritability, headache, dizziness, sweating, tremors, nausea, vomiting, abdominal cramps, weight loss or anorexia, nightmares or insomnia, and if used for treating seizures, can result in an increase in seizures.

The Canadian distributor, Pharmascience Inc. of Montreal, is recalling all lots on the market, though so far, there have been no reports of adverse reactions associated with consumption of the drug.

Consumers seeking more information can contact Health Canada at (613) 957-2991 or toll-free at 1-866-225-0709.