Clonidine Withdrawal: Rebound Blood Pressure

Clonidine withdrawal timeline at a glance

Phase	When	What you may feel	Severity	Red flags
Early rebound	Within about a day of a missed dose or sudden stop (timing varies)	Nervousness, restlessness; Agitation; Headache; Tremor or shaking hands	Severe	Chest pain, a racing or pounding heart, or a severe headache with very high blood pressure (call 911)
Blood pressure rebound	Can follow the early symptoms	Rapid rise in blood pressure; Palpitations; Nausea	Can be life-threatening	Chest pain, a racing or pounding heart, or a severe headache with very high blood pressure (call 911); Confusion, vision changes or weakness on one side (call 911)

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Symptoms, phase by phase

The clonidine label says sudden cessation has, in some cases, caused nervousness, agitation, headache and tremor accompanied or followed by a rapid rise in blood pressure and raised stress hormones (catecholamines). The NHS adds restlessness, palpitations and feeling sick. MedlinePlus says clonidine is also used to treat ADHD, and the NHS says the warning applies whatever you take it for. MedlinePlus adds that sudden stopping can cause a fast heartbeat, anxiety, nausea, flushing, lightheadedness and chest tightness.

Early rebound: Within about a day of a missed dose or sudden stop (timing varies)

• Nervousness, restlessness
• Agitation
• Headache
• Tremor or shaking hands

Blood pressure rebound: Can follow the early symptoms

• Rapid rise in blood pressure
• Palpitations
• Nausea

What makes withdrawal longer or shorter

• Dose. The label says reactions to stopping appear more likely after higher doses.
• Beta-blockers. The label says rebound is more likely if you also take a beta-blocker, and that the beta-blocker is usually withdrawn first.
• Vomiting illness. The label notes children who can’t keep doses down are at risk of sudden high blood pressure.

When to see a doctor or get help now

• Before you stop or reduce clonidine.
• If you can’t take doses because of vomiting, contact your doctor the same day.
• Call 911 for chest pain, a severe headache, confusion or vision changes.

Not sure where to start? Call SAMHSA’s free, confidential helpline at 1-800-662-4357, 24/7. See Get Help.

Tapering

The NHS says the dose should be reduced gradually. The label notes that if you also take a beta-blocker, it’s usually withdrawn several days before clonidine is gradually stopped. We don’t publish dose-by-dose schedules. Your prescriber should set your plan, and adjust it if symptoms appear.

Tips for getting through it

• Never run out; set refill reminders
• Check your blood pressure at home if your doctor advises
• Keep doses on schedule

Frequently asked questions

How quickly does clonidine rebound happen?

It can start within about a day of a missed dose or sudden stop, given its 12 to 16 hour half-life.

Is clonidine withdrawal dangerous?

It can be: the NHS warns that stopping suddenly can cause dangerously high blood pressure.

I take clonidine for ADHD. Does this apply?

Yes. The NHS says the risk applies whatever you take clonidine for, and MedlinePlus says not to stop it without talking to your doctor.

Next steps

• Combine timelinesAdd other things you are stopping and see them on one chart
• Talk to othersAsk questions on our community forum (peer support, not medical advice)
• Read nextBeta-Blocker Withdrawal (Propranolol, Metoprolol)
• Get helpFree, confidential helplines and when to see a doctor

Related timelines

• Beta-Blocker Withdrawal (Propranolol, Metoprolol)
• Opioid Withdrawal Timeline: Short-Acting vs Long-Acting
• Adderall Withdrawal Timeline

Sources

1. FDA label: Clonidine hydrochloride tablets (DailyMed)
2. NHS: Clonidine
3. MedlinePlus: Clonidine

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Last reviewed: October 25, 2026. Researched and written by Withdrawal Timelines from the cited sources. This article has not yet been reviewed by a medical professional. See How We Review and our Medical Disclaimer. This is general information, not medical advice.