The Canadian Ministry of Health warns parents about two brands of medical children's syrup after learning that they contain an unauthorized substance.

On Thursday, the federal administration issued a public warning about the use of Robikids and Solmux, both of which were advertised on Facebook by Kamshoppe.

The Canadian Ministry of Health also stated that the two brands contain a substance called Carbocisteine, which may pose serious health risks.

Side effects may include nausea, diarrhea, and allergic reactions such as anaphylaxis and gastrointestinal bleeding.

"Do not use these products. Return them to the local pharmacy for proper disposal. Consult a healthcare professional if you or your child have used any of these products and have health concerns," said the Health Canada advisory.

The Canadian Ministry of Health also said that other countries use Carbocisteine to treat conditions where too much mucus accumulates in the respiratory system.

In addition to various side effects, the department said that Carbocisteine is also not recommended for pregnant women.

The Canadian Ministry of Health said it would inform citizens if it learns of other distributors or retailers offering these two products.

Consumers can also confirm whether a health product is authorized for sale in Canada by checking the eight-digit drug identification number, natural product number, or homeopathic medicine number.

Other sources include the Licensed Natural Health Products Database and the Drug Products Database.

Consumers can also report side effects or complaints to Health Canada.