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If you use cannabis and have an upcoming surgical procedure, telling your surgeon and anesthesia team is an important part of preparing safely. Cannabis can affect your heart rate, blood pressure, breathing, response to anesthesia, pain control, nausea, and recovery. These effects vary depending on what you use, how often you use it, how you consume it, and when you last used it.
Cannabis use includes smoking, vaping, edibles, oils, tinctures, concentrates, CBD products, and prescription cannabinoid medications. Being open about your use is not about judgment. It gives your healthcare team information they can use to reduce risks and plan appropriate care.
Cannabis Can Affect Anesthesia
Anesthesia medications are carefully selected based on your health, medical history, medications, procedure, and expected response. Regular cannabis use may change how some patients respond to anesthetic or sedative drugs.
Tell your anesthesiologist what products you use, how often, approximately how much, and when you last used cannabis. Someone who occasionally consumes an edible may have different considerations from someone who smokes or vapes cannabis every day. Providing accurate information helps your team anticipate possible concerns and adjust your care when necessary.
Smoking Cannabis May Affect Your Heart and Airways
Cannabis can temporarily increase heart rate and affect blood pressure. These changes matter around surgery because anesthesia and the procedure itself can also place demands on your cardiovascular system.
Smoking cannabis shortly before surgery may be especially concerning. Current perioperative guidance recommends delaying elective surgery for at least two hours after cannabis smoking. Depending on your health, frequency of use, and type of surgery, your healthcare team may recommend avoiding cannabis for longer.
Smoking and vaping can also irritate your airways, potentially contributing to coughing or increased airway sensitivity. Because airway management is an important part of many procedures involving anesthesia, tell your team if you regularly smoke or vape cannabis.
Cannabis May Influence Pain and Recovery
Frequent cannabis use may complicate postoperative pain management for some patients. Research suggests regular users can sometimes experience greater pain after surgery and may require different pain-control strategies.
If you use cannabis for chronic pain, make sure your doctor knows. Your care team may consider non-opioid pain relievers, local anesthetics, regional anesthesia, or other approaches based on your procedure and individual needs.
Cannabis can also affect the practical realities of healing. Smoking may trigger coughing that places stress on incisions, while combining cannabis with opioids, sleep medicines, benzodiazepines, or other sedating drugs may increase drowsiness and impairment. Discussing temporary alternatives and risk-reduction strategies with your healthcare provider can help protect your recovery.
Preoperative Consultations Are the Right Time to Discuss Cannabis
Cannabis use should ideally be discussed well before the day of surgery. Preoperative planning gives your healthcare team time to review your medical history, current medications, previous reactions to anesthesia, and lifestyle factors that could influence the procedure or recovery.
This is particularly important when planning complex or multi-stage operations, where anesthesia time, healing expectations, and postoperative care may vary depending on the procedures involved. During an FFS consultation, for example, patients may discuss their medical history, surgical goals, and the combination of procedures being considered. Sharing relevant cannabis use during this broader preoperative assessment gives the surgical and anesthesia teams a more complete picture when evaluating potential risks and planning care.
Edibles, CBD, and Prescription Cannabinoids Still Matter
Do not assume only smoked marijuana needs to be disclosed. Edibles may have longer-lasting and less predictable effects, while CBD products may interact with certain medications or influence how your body processes them.
Mention gummies, oils, capsules, tinctures, concentrates, and prescription cannabinoids. If possible, provide information about the product, dose, and frequency of use. Bringing a product label or a list of ingredients may also help if you are unsure about the exact THC or CBD content.
If you take cannabinoid medication for a medical condition, do not stop it abruptly without professional guidance. Your healthcare team can explain whether you should continue, adjust, or temporarily stop a medication before surgery.
When Should You Stop and Restart Cannabis?
There is no universal timeline that applies to every patient. Recommendations depend on the cannabis product, frequency of use, method of consumption, medical history, and type of surgery.
Cannabis smoking on the day of surgery is generally discouraged. If you use cannabis shortly before your procedure, tell your medical team exactly what you used and when. They can decide whether proceeding is appropriate or whether delaying surgery would be safer.
There is also no single timeline for restarting cannabis after surgery. Smoking may irritate your airway and cause coughing, while cannabis may interact with medications used during recovery. Ask your healthcare team when it is appropriate to resume use based on your procedure, healing progress, and medications.
What Should You Tell Your Surgical Team?
Be prepared to explain what cannabis products you use, how you consume them, how often and how much you use, and when you last used cannabis. You should also mention whether you use it for pain, anxiety, sleep, nausea, or another medical reason.
Frequent users should discuss any previous withdrawal symptoms, such as irritability, anxiety, difficulty sleeping, restlessness, or reduced appetite. These symptoms can overlap with common postoperative concerns, so knowing about your cannabis use may help your healthcare team identify and manage problems appropriately.
Clear communication allows your surgeon and anesthesiologist to make informed decisions about anesthesia, pain management, nausea prevention, medication interactions, and postoperative care.
Open Communication Supports Safer Surgical Care
Cannabis use is relevant medical information, just like prescription medicines, supplements, alcohol use, smoking, and allergies. Recommendations may differ between patients, especially when cannabis is used frequently or for medical reasons.
You should not hide recent cannabis use because you are concerned about judgment or believe it is unrelated to your procedure. Your healthcare team needs accurate information to understand potential risks and determine the safest approach.
By discussing cannabis early, following individualized instructions, and considering temporary alternatives when appropriate, you can take a proactive role in reducing avoidable risks. The goal is to make informed decisions and give your healthcare team the information needed to plan safer treatment and support a smoother recovery before, during, and after surgery.
