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Selegiline

Selegiline Side Effects

Robert Chad Hakim, PharmD, BCCCPKristianne Hannemann, PharmD
Reviewed by Robert Chad Hakim, PharmD, BCCCP, Kristianne Hannemann, PharmD
Last reviewed on October 25, 2024

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

[[EDITOR|DRUG_DISPLAY_NAME|||title]] tablets and capsules:

  • Nausea (20%)
  • Dizziness (14%)
  • Stomach pain (8%)
  • Confusion (6%)
  • Hallucinations (6%)
  • Dry mouth (6%)

Zelapar (selegiline) ODTs:

  • Nausea (11%)
  • Dizziness (11%)
  • General body pain (8%)
  • Headache (7%)
  • Trouble sleeping (7%)
  • Runny nose (7%)
  • Involuntary movements (dyskinesia; 6%)
  • Skin irritation (6%)
  • Back pain (5%)
  • Indigestion (5%)
  • Inflamed or sore mouth (5%)
  • Other irritation in the mouth (e.g., pain when swallowing, pain in mouth, mouth sores)

Less Common Side Effects

[[EDITOR|DRUG_DISPLAY_NAME|||title]] tablets and capsules:

  • Headache
  • Involuntary movements
  • Vivid dreams
  • Trouble sleeping

Zelapar (selegine) ODTs:

  • Muscle aches
  • Tremor or shaking
  • Poor coordination
  • Sleepiness
  • Vomiting
  • Constipation
  • Dry mouth
  • Sore throat
  • Shortness of breath
  • Rash
  • Hallucinations
  • High blood pressure

Selegiline serious side effects

Contact your healthcare provider immediately if you experience any of the following.

  • Extreme drowsiness or falling asleep without warning
  • Extremely high blood pressure: seizure, chest pain, severe headache, confusion, blurred vision, anxiety, trouble breathing
  • Serotonin syndrome: hallucinations, seizure, confusion, restlessness, shivering, sweating, high fever, headache, racing heart, muscle stiffness or twitching, tremor
  • Impulse-control behavior: intense urges (e.g., gambling, shopping, binge eating, engaging in sexual activity)
  • Serious withdrawal symptoms (neuroleptic malignant syndrome): high fever, sweating, stiff muscles, confusion, not aware of your surroundings, fast or irregular heartbeat

Source: DailyMed

The following Selegiline 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:

More common

Twitching, twisting, uncontrolled repetitive movements of the tongue, lips, face, arms, or legs

Less common

Blurred vision

bruising

chest pain

convulsions

decreased urine

difficult or labored breathing

difficulty with swallowing

discouragement

dizziness

dry mouth

feeling sad or empty

headache

increased thirst

irregular heartbeat

irritability

large, flat, blue or purplish patches in the skin

loss of appetite

loss of interest or pleasure

mood changes

muscle pain or cramps

nausea or vomiting

nervousness

numbness or tingling in the hands, feet, or lips

pounding in the ears

seeing, hearing, or feeling things that are not there

shakiness and unsteady walk

shakiness in the legs, arms, hands, or feet

sleepiness or unusual drowsiness

slow or fast heartbeat

swelling or inflammation of the mouth

tightness in the chest

tiredness

trouble concentrating

trouble sleeping

unsteadiness, trembling, or other problems with muscle control or coordination

unusual tiredness or weakness

Incidence not known

Agitation

diarrhea

dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position

fever

overactive reflexes

poor coordination

restlessness

shivering

sweating

talking or acting with excitement you cannot control

Get emergency help immediately if any of the following symptoms of overdose occur:

Symptoms of overdose

Agitation

chest pain

difficulty opening the mouth or lockjaw

dizziness (severe) or fainting

fast or irregular pulse (continuing)

high fever

high or low blood pressure

severe spasm where the head and heels are bent backward and the body arched forward

troubled breathing

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

Dry skin

hives, itching, or skin rash

itching, scaling, severe redness, soreness, or swelling of the skin

runny nose

sneezing

stuffy nose

trouble sleeping

Less common

Acid or sour stomach

back pain

belching

bloated or full feeling

body aches or pain

congestion

cough

difficulty having a bowel movement (stool)

difficulty with moving

dryness or soreness of the throat

excess air or gas in the stomach or intestines

heartburn

hoarseness

indigestion

joint pain

leg cramps

muscle aching or cramping

muscle pains or stiffness

passing gas

stomach discomfort, upset, or pain

swollen joints

tender, swollen glands in the neck

tooth problems

voice changes

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.

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Why trust our experts?

Robert Chad Hakim, PharmD, BCCCP, started his full-time career as a clinical pharmacist at UCLA Health in the general medicine, general cardiology, and ICU units after completing residency in 2016. He also was the preceptor for the general medicine rotation from 2017 to 2021, which was a required rotation for all pharmacy residents.
Kristianne Hannemann, PharmD, is a licensed pharmacist in California. She has been a retail pharmacy manager and staff pharmacist for over 7 years and has contributed drug information content to different health companies.

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