Cannabis for medical use can be taken orally or by inhalation. Oral intake involves preparing a decoction by boiling the inflorescences of the plant in water. Inhalation, on the other hand, involves using a vaporizer with hot, filtered air. The route of administration is determined by the physician based on the desired effects. Cannabis for medical use can have side effects, although they may vary depending on factors such as the route of administration, dosage, type of disorder being treated, and patient's sensitivity to the substance. Some specific contraindications include individuals with psychiatric disorders, previous history of drug addiction, severe cardio-pulmonary disorders, severe liver and kidney insufficiency, ongoing treatment with certain drugs, adolescents and young adults, pregnant or breastfeeding women.