• They may contain ingredients not listed on the label. This includes ingredients like prescription drugs, possibly at doses exceeding maximum recommended amounts. Prescription drugs should be taken only under the supervision of a health professional because they may cause serious side effects. Using a product that contains ingredients that the consumer is not aware of increases the chance of dangerous allergies and interactions with other medications and foods.
• The label may indicate a dangerous ingredient or combination of ingredients. For example, it could list a drug that should be available only by prescription from a health care professional, or a combination of ingredients that Health Canada does not permit because of serious health risks.

What companies should know:

• Selling unauthorized health products in Canada is illegal.
• When Health Canada identifies unauthorized products that may pose serious health risks, Health Canada takes appropriate action to prevent further distribution and informs Canadians. This includes working with the Canada Border Services Agency to help prevent further importation of unauthorized products.

• Stop using the products listed below. Consult your health care professional if you have used these products and have health concerns, and for advice on which health products are best for you and your family.
• Read product labels to verify that health products have been authorized for sale by Health Canada. Authorized health products have an eight-digit Drug Identification Number (DIN), Natural Product Number (NPN) or Homeopathic Drug Number (DIN-HM). You can also check if products have been authorized for sale by searching Health Canada’s Drug Product Database and Licensed Natural Health Product Database.
• Report any health product adverse events or complaints to Health Canada.
• See the additional information on buying health products safely in the helpful links below.

Dapoxetine is a drug used to treat premature ejaculation and is not authorized for sale in Canada. Side effects include fainting or loss of consciousness, dizziness, changes in blood pressure, blurred vision, seizures, headache, diarrhea and nausea. In particular, dapoxetine should not be used by individuals who have cardiac conditions, liver disease, a history of mania or bipolar disorder, or who are taking certain other medications, including monoamine oxidase inhibitors, antidepressants, and a number of other drugs and herbal products that can interact with dapoxetine.

Flibanserin is a prescription drug used to treat hypoactive (low) sexual desire disorder (HSDD) in premenopausal women who have not had problems with low sexual desire in the past and should only be used under the supervision of a health care professional. Women should not take flibanserin if they have liver problems, are pregnant or breastfeeding, if they are taking certain other medicines, or if they have low blood pressure and drink alcohol. Common side effects include dizziness, sleepiness, nausea and tiredness. Serious side effects include fainting, low blood pressure, abnormally fast heartbeat, and mental health changes such as dissociation from reality, hallucination, intensely excited mood and racing thoughts. The risk of side effects increases with the amount taken (dose).

"Poppers" is a slang term for products that contain alkyl nitrites. Despite being labelled for various uses such as leather cleaners, room odourizers or liquid incense, these products are inhaled or ingested by consumers for recreational purposes. Alkyl nitrites, such as amyl nitrite, butyl nitrite and isobutyl nitrite are prescription drugs and should be used only under the supervision of a healthcare professional. Products containing alkyl nitrites may pose serious risks, including death, depending on the amount used, how frequently they are used and how long they are used for, as well as the person's health and the other medications they may be taking. Since it is difficult to control how much is inhaled, people can accidentally overdose. Swallowing these products can lead to serious medical complications and may be fatal. People with certain medical conditions (including recent head trauma, bleeding into the head, glaucoma, or heart disease) and those taking certain medications (particularly drugs used to treat erectile dysfunction, and other drugs such as high blood pressure medications, certain migraine drugs, and high doses of aspirin) or illicit drugs are at particular risk.

Sildenafil is a prescription drug used to treat erectile dysfunction and should be used only under the supervision of a health care professional. It should not be used by individuals taking any kind of nitrate drug (e.g. nitroglycerine) as it can cause potentially life-threatening low blood pressure. Individuals with heart problems are at increased risk of cardiovascular side effects such as heart attack, stroke, chest pain, high blood pressure and abnormal heartbeat. Other possible side effects include headache, facial flushing, indigestion, dizziness, abnormal vision, and hearing loss. Desmethyl carbodenafil and dithiodesmethyl carbodenafil, and Hydroxythiohomosildenafil are unauthorized substances that are similar to sildenafil and may pose similar health risks.

Tadalafil is a prescription drug used to treat erectile dysfunction and should be used only under the supervision of a health care professional. It should not be used by individuals taking any kind of nitrate drug (e.g., nitroglycerine) since it can cause potentially life-threatening low blood pressure. Individuals with heart problems are at increased risk of cardiovascular side effects such as heart attack, stroke, chest pain, high blood pressure and abnormal heartbeat. Other possible side effects include headache, facial flushing, indigestion, dizziness, abnormal vision, and hearing loss. Aminotadalafil is an unauthorized substance that is similar to tadalafil and may pose similar health risks.

Yohimbine is a prescription drug and should be used only under the supervision of a health care professional. Yohimbine is derived from yohimbe, a bark extract. The use of yohimbine or yohimbe may result in serious adverse reactions particularly in people with high blood pressure, or heart, kidney or liver disease. Side effects include increased blood pressure and heart rate, anxiety, dizziness, tremors, headache, nausea and sleep disorders. It should not be used by children, or pregnant or nursing women.

• Buying drugs over the Internet
• Adulteration of natural health products
• Risks of buying natural health products online
• The safe use of health products for weight loss