The following side effects may get better over time as your body gets used to the medication. Let your healthcare provider know immediately if you continue to experience these symptoms or if they worsen over time.
Common Side Effects
- Sleepiness (up to 38%)
- Headache (up to 20%)
- Fatigue (up to 16%)
- Upper stomach pain (up to 15%)
Less Common Side Effects
- Irritable
- Dizziness
- Trouble sleeping
- Nightmare
- Mood problems
- Nausea
- Low appetite
Clonidine ER serious side effects
Contact your healthcare provider immediately if you experience any of the following.
- Severe allergic reaction: trouble breathing; rash; swelling of the face, lips, tongue, or throat
- Dangerously low blood pressure: lightheadedness, dizziness, feeling faint, tiredness, confusion
Source: DailyMed
The following Clonidine ER side effects have also been reported
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
Rare
blistering, burning, crusting, dryness, or flaking of the skin
chest pain or discomfort
confusion as to time, place, or person
decreased urine output
dilated neck veins
drowsiness
fast, pounding, or irregular heartbeat or pulse
general feeling of discomfort or illness
holding false beliefs that cannot be changed by fact
hyperventilation
irregular breathing
irritability
itching, scaling, severe redness, soreness, or swelling of the skin
large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
lightheadedness, dizziness, or fainting
mental depression
paleness or cold feeling in the fingertips and toes
pounding, slow heartbeat
problems in urination or increase in the amount of urine
raised red swellings on the skin, lips, tongue, or in the throat
restlessness
seeing or hearing things that are not there
shaking
shortness of breath
skin rash
swelling of the face, fingers, feet, or lower legs
tightness in the chest
tingling or pain in the fingers or toes when exposed to cold
trouble with sleeping
troubled breathing
unusual excitement, nervousness, or restlessness
unusual tiredness or weakness
vivid dreams or nightmares
Get emergency help immediately if any of the following symptoms of overdose occur:
Symptoms of overdose
Dizziness (extreme) or faintness
feeling cold
pinpoint pupils of the eyes
unusual tiredness or weakness (extreme)
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
More common
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.
