Who Should Avoid Cannabis: Important Safety Considerations and Contraindications

Cannabis use has become increasingly common for wellness, pain management, and recreational purposes, but it is not suitable for everyone. Medical experts emphasize that certain individuals should avoid cannabis entirely or use it only under close medical supervision due to potential health risks. Understanding these contraindications helps promote safer, more informed decisions about cannabis consumption.

This article outlines key groups who should generally avoid or approach cannabis with extreme caution, based on current medical consensus from sources like the Mayo Clinic, CDC, and other health authorities.

Pregnant and Breastfeeding Individuals

One of the strongest recommendations across medical organizations is that pregnant women should completely avoid cannabis. THC and other cannabinoids can cross the placenta and affect fetal development. Potential risks include low birth weight, premature birth, stillbirth, and developmental issues affecting attention, memory, and cognitive function later in childhood.

These concerns extend to breastfeeding, as THC can pass into breast milk and potentially impact infant brain development. The American College of Obstetricians and Gynecologists and the American Academy of Pediatrics strongly advise against use during pregnancy and lactation. No amount has been proven safe.

Adolescents and Young Adults Under 25

The human brain continues developing until approximately age 25, particularly in areas responsible for decision-making, impulse control, and memory. Regular cannabis use during this period is associated with higher risk of cannabis use disorder, potential impacts on cognitive development, and increased vulnerability to mental health issues, including anxiety, depression, and psychosis.

People with a Personal or Family History of Psychosis, Schizophrenia, or Bipolar Disorder

Cannabis, particularly high-THC varieties, can exacerbate or trigger symptoms in individuals with a predisposition to psychotic disorders. Those with a family history of these conditions face elevated risks.

Individuals with Cardiovascular or Heart Conditions

Cannabis can temporarily increase heart rate and blood pressure, which poses risks for people with active heart disease, arrhythmias, history of heart attack, or poorly controlled hypertension.

People with Respiratory or Lung Issues

Smoking or vaping cannabis can irritate the lungs. Individuals with asthma, COPD, or chronic bronchitis are generally advised to avoid inhaled forms.

Those with Liver, Kidney, or Severe Organ Disease

Frequent cannabis use can place additional stress on the liver and kidneys. People with serious organ conditions should exercise caution or avoid use.

Individuals with a History of Substance Use Disorder

People with current or past substance misuse issues face a higher risk of developing cannabis use disorder.

Older Adults (65+)

While many seniors explore cannabis for pain or sleep, concerns include increased fall risk, drug interactions, and potential cognitive effects.

Other Important Considerations

Medication Interactions: Cannabis can interact with various drugs, including blood thinners, certain seizure medications, and others.

Before Surgery: Many anesthesiologists recommend stopping cannabis use at least two weeks before procedures.

Practical Advice for Safer Decisions

• Consult healthcare professionals before considering cannabis use, especially if you have pre-existing conditions or take medications.
• If cleared for use, start low and go slow.
• Choose quality products from reputable sources. In Phoenix, Arizona, for example, dispensaries like JARS Cannabis Phoenix Airport are known for offering lab-tested products with clear labeling, which helps consumers better understand cannabinoid profiles and make more informed choices.
• Keep a journal of usage and any side effects.
• Prioritize safety and education.

The Bottom Line

While cannabis shows promise for many wellness applications, it carries real risks for specific populations. Pregnant or breastfeeding individuals, young people under 25, those with certain mental health histories, heart conditions, and other vulnerabilities are generally advised to avoid it. Prioritizing safety through education and professional guidance remains essential as research continues to evolve.

Responsible cannabis education focuses on empowering people to make informed choices that protect their health. If you fall into any of these categories, the safest approach is to consult a qualified healthcare provider before considering use.