The Most Important Page on This Website

If you read only one page in the Reducing Pharmaceuticals section, make it this one.

We understand why people want to reduce their pharmaceutical medications. Side effects, cost, the desire for a more natural approach, concerns about long-term dependence — these are all legitimate reasons to explore alternatives. But how you reduce matters as much as whether you reduce.

Stopping certain medications abruptly can cause seizures, dangerous blood pressure spikes, severe withdrawal, psychosis, and death. This is not an exaggeration. It is well-documented medical fact.

No matter how well cannabis is working for you, no matter how confident you feel, no matter what anyone on the internet tells you: never stop taking a prescribed medication without your doctor's guidance.

Opioids

Medications include: oxycodone (OxyContin, Percocet), hydrocodone (Vicodin, Norco), morphine, codeine, fentanyl patches, tramadol, methadone, buprenorphine (Suboxone).

What Happens If You Stop Abruptly

Opioid withdrawal is intensely unpleasant and, in certain circumstances, can be dangerous. Symptoms typically begin within 6 to 24 hours of the last dose (depending on the specific opioid) and can include:

• Severe muscle cramps and bone pain
• Profuse sweating, chills, and goosebumps
• Nausea, vomiting, and diarrhea (which can lead to dangerous dehydration)
• Extreme anxiety, agitation, and insomnia
• Rapid heartbeat and elevated blood pressure
• Intense cravings that can drive relapse — and relapse after a period of abstinence is the most dangerous time for overdose, because tolerance has dropped

While opioid withdrawal itself is rarely fatal in otherwise healthy adults, the complications it triggers — severe dehydration, cardiac events, relapse and subsequent overdose — can be life-threatening. For people with other health conditions, the physical stress of withdrawal poses additional risks.

How Tapering Works

Medical opioid tapering is a gradual, supervised process:

• Doses are typically reduced by 10% to 25% at a time
• Each reduction is held for days to weeks, allowing your body to adjust
• The pace depends on how long you have been on opioids, your current dose, and your response to each reduction
• Your provider monitors for withdrawal symptoms and adjusts the plan accordingly
• The entire process may take weeks to months — and that is appropriate

A 2025 JAMA Internal Medicine study tracked chronic pain patients who enrolled in New York’s Medical Cannabis Program. Over 18 months, participants reduced their average opioid dose by 22% — under medical supervision, gradually, and as part of a structured program. This is what safe opioid reduction looks like.

Slawek et al., JAMA Internal Medicine, 2025

Benzodiazepines

Medications include: alprazolam (Xanax), clonazepam (Klonopin), diazepam (Valium), lorazepam (Ativan), temazepam (Restoril).

What Happens If You Stop Abruptly

Benzodiazepines work by enhancing the effect of GABA, a neurotransmitter that calms brain activity. When you take them regularly, your brain reduces its own GABA production to compensate. If the medication is suddenly removed, your brain is left in a hyperexcitable state with insufficient calming signals. This can cause:

• Seizures — including grand mal seizures, which can occur even in people with no seizure history. This is the most acutely dangerous risk.
• Psychosis — hallucinations, paranoia, and severe confusion
• Severe rebound anxiety — far worse than the anxiety the medication was treating
• Insomnia — sometimes lasting weeks
• Tremors, muscle twitching, and sensory disturbances
• In severe cases, death — usually from seizure-related complications

How Tapering Works

Benzodiazepine tapering is one of the most delicate processes in medicine:

• Reductions are typically very small — sometimes as little as 5% to 10% of the current dose
• Each reduction may be held for two to four weeks or longer
• Some providers switch patients from short-acting benzodiazepines (like Xanax) to longer-acting ones (like Valium) to enable smoother tapering
• The process can take months, and for long-term users, it may take a year or more
• Rushing a benzodiazepine taper is dangerous

SSRIs and SNRIs (Antidepressants)

SSRIs include: fluoxetine (Prozac), sertraline (Zoloft), escitalopram (Lexapro), citalopram (Celexa), paroxetine (Paxil).

SNRIs include: venlafaxine (Effexor), duloxetine (Cymbalta), desvenlafaxine (Pristiq).

What Happens If You Stop Abruptly

Abruptly stopping antidepressants can cause antidepressant discontinuation syndrome, which affects an estimated 20% to 50% of patients who stop abruptly after taking these medications for six weeks or more. Symptoms include:

• Brain zaps — electric shock-like sensations in the head, one of the most commonly reported and disturbing symptoms
• Dizziness, vertigo, and balance problems
• Flu-like symptoms — nausea, fatigue, headache, muscle aches
• Insomnia and vivid dreams
• Irritability, anxiety, and mood swings
• Return of depression — which may be worse than the original episode. It can be difficult to distinguish between discontinuation syndrome and a depressive relapse, which is another reason medical supervision matters.

Certain SSRIs and SNRIs are more likely to cause discontinuation syndrome than others. Paroxetine (Paxil) and venlafaxine (Effexor) are among the most challenging to stop. Fluoxetine (Prozac), because of its very long half-life, tends to cause fewer discontinuation issues.

How Tapering Works

• Doses are typically reduced by 10% to 25% at intervals of two to four weeks
• Some providers use liquid formulations for more precise dose reductions
• For difficult-to-taper medications like venlafaxine, providers may cross-taper to fluoxetine first
• Symptoms at each step are evaluated before proceeding to the next reduction
• The timeline varies from weeks to months depending on the medication and duration of use

Blood Pressure Medications

Medications include: lisinopril, amlodipine, losartan, metoprolol, atenolol, hydrochlorothiazide, clonidine, and many others.

What Happens If You Stop Abruptly

Blood pressure medications manage a condition that is often silent — you typically do not "feel" high blood pressure. This creates a dangerous false sense of security: people stop the medication, feel fine, and assume they do not need it. Meanwhile:

• Rebound hypertension — blood pressure can spike to dangerously high levels, sometimes higher than pre-treatment levels
• Clonidine carries special risk — abruptly stopping clonidine can cause a hypertensive crisis (a medical emergency) with severe headache, rapid heart rate, sweating, and anxiety
• Beta-blockers (metoprolol, atenolol) — sudden discontinuation can cause rapid heart rate, chest pain, and in people with coronary artery disease, can trigger a heart attack
• Stroke and heart attack risk increases with uncontrolled blood pressure spikes

How Tapering Works

• Blood pressure is monitored regularly as doses are reduced
• Reductions are typically made one medication at a time in patients taking multiple blood pressure drugs
• Lifestyle modifications (exercise, diet, weight loss, stress reduction) may allow for dose reductions over time
• Beta-blockers are tapered gradually over one to two weeks minimum

Anti-Seizure Medications

Medications include: levetiracetam (Keppra), lamotrigine (Lamictal), valproic acid (Depakote), carbamazepine (Tegretol), topiramate (Topamax), phenytoin (Dilantin), gabapentin, pregabalin (Lyrica).

What Happens If You Stop Abruptly

• Breakthrough seizures — seizures that were controlled by medication can return, sometimes with greater severity than before treatment
• Status epilepticus — a medical emergency in which seizures occur in rapid succession without recovery between them. This can cause brain damage and death.
• Rebound effects — many anti-seizure medications are also used for mood stabilization, nerve pain, and migraine prevention. Stopping them can cause a return of these symptoms as well.

How Tapering Works

• Anti-seizure medication tapering is done very gradually, typically over weeks to months
• EEG monitoring may be used to assess seizure risk during the taper
• Reductions are paused or reversed if seizure activity increases
• Only a neurologist or epilepsy specialist should manage anti-seizure medication changes

Other Medications Requiring Careful Tapering

The classes above are the most commonly discussed, but many other medications should never be stopped abruptly:

• Corticosteroids (prednisone, dexamethasone) — long-term use suppresses your adrenal glands. Stopping suddenly can cause adrenal crisis, a life-threatening condition.
• Antipsychotics — abrupt discontinuation can cause withdrawal psychosis, severe insomnia, nausea, and a return of psychotic symptoms.
• Sleep medications (zolpidem/Ambien, eszopiclone/Lunesta) — can cause severe rebound insomnia, anxiety, and in some cases, seizures.
• Muscle relaxants (baclofen, tizanidine) — abrupt baclofen withdrawal can cause hallucinations, seizures, and high fever.
• ADHD stimulants — while not medically dangerous to stop, abrupt discontinuation can cause a "crash" with fatigue, depression, and difficulty concentrating.

The Safe Path: Principles of Medication Reduction

If you and your healthcare provider decide that reducing a medication makes sense, these principles apply regardless of the drug class:

1. One change at a time. If you are starting cannabis AND tapering a medication simultaneously, you will not know which change is causing which effect. Ideally, stabilize on cannabis first, then begin tapering with your doctor's guidance.
2. Go slow. Slower tapers are almost always safer and more comfortable. There is no prize for speed.
3. Monitor and document. Track your symptoms daily. Share the data with your provider. If symptoms worsen, the taper may need to pause or slow down.
4. Be willing to reverse course. A taper that is not going well can and should be paused or reversed. Deciding to stay on a medication is not failure — it is good self-care.
5. Have a plan for setbacks. Know what symptoms to watch for, when to call your doctor, and when to go to an emergency room.
6. Accept that some medications cannot be fully eliminated. For some conditions, pharmaceutical treatment remains necessary regardless of what complementary approaches you add. This is not a failing of cannabis or of you.

Further Reading

Related Pages on TryCannabis.org

• Having the Conversation — how to discuss medication changes with your doctor
• Complement vs. Replacement — when cannabis works alongside vs. instead of medications
• Drug Interactions — how cannabis interacts with common medications
• Cannabis for Chronic Pain — the opioid reduction research
• Epilepsy & Seizures — CBD and seizure management

Studies Referenced on This Page

• Slawek et al. (2025), JAMA Internal Medicine — NYS Medical Cannabis Program and 22% opioid reduction under medical supervision

External Resources

• Society of Cannabis Clinicians — find a provider who understands both cannabis and pharmaceutical management
• Leaf411 — free guidance from cannabis-trained registered nurses
• Penn State CANN-DIR — cannabinoid drug interaction checker