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Cyproheptadine

Cyproheptadine Side Effects

Kristianne Hannemann, PharmDConnie Zheng, PharmD
Reviewed by Kristianne Hannemann, PharmD, Connie Zheng, PharmD
Last reviewed on October 6, 2023

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
  • Dizziness
  • Loss of coordination
  • Confusion
  • Blurred vision
  • Low blood pressure
  • Difficulty urinating
  • Dryness of nose, throat, and mouth

Less Common Side Effects

  • Restlessness
  • Tremor
  • Hallucinations
  • Trouble sleeping (insomnia)
  • Excitement
  • Rash
  • Fast heartbeat
  • Nausea and vomiting
  • Weight gain

Cyproheptadine serious side effects

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

  • Signs of overdose: hallucinations, slow brain function, seizures, fast heartbeat, wide pupils, breathing problems
  • Excessive sleepiness or dizziness
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When do Cyproheptadine possible side effects begin and end?
Time passed since treatment started:
M
H
D
W
M
Sleepiness
Dizziness
Dry mouth

Source: DailyMed

The following Cyproheptadine 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:

Less common or rare

Less common or rare with azatadine, cetirizine, clemastine, cyproheptadine, desloratadine, dexchlorpheniramine, diphenhydramine, or loratadine

Abdominal or stomach pain

burning

chills

clay-colored stools or dark urine

cough

diarrhea

difficulty swallowing

dizziness

fast or irregular heartbeat

fever

headache

hives

itching

prickly sensations

puffiness or swelling of the eyelids or around the eyes, face, lips or tongue

redness of skin

seizures

shortness of breath

skin rash

swelling

tightness in chest

tingling

unusual tiredness or weakness

wheezing

Check with your doctor as soon as possible if any of the following side effects occur:

Less common or rare

Sore throat

unusual bleeding or bruising

unusual tiredness or weakness

Symptoms of overdose

Clumsiness or unsteadiness

convulsions (seizures)

drowsiness (severe)

dryness of mouth, nose, or throat (severe)

feeling faint

flushing or redness of face

hallucinations (seeing, hearing, or feeling things that are not there)

shortness of breath or troubled breathing

trouble in sleeping

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

Drowsiness

dry mouth, nose, or throat

gastrointestinal upset, stomach pain, or nausea

headache

increased appetite and weight gain

thickening of mucus

Less common or rare

Acid or sour stomach

belching

blurred vision or any change in vision

body aches or pain

clumsiness or unsteadiness

confusion (not with diphenhydramine)

congestion

constipation

cough

diarrhea

difficult or painful urination

difficulty in moving

difficult or painful menstruation

dizziness (not with brompheniramine or hydroxyzine)

drowsiness (with high doses of desloratadine and loratadine)

dryness of mouth, nose, or throat

early menstruation

fast heartbeat

fever

heartburn

hoarseness

increased sensitivity of skin to sun

increased sweating

indigestion

loss of appetite

joint pain

muscle aching or cramping

muscle pains or stiffness

nausea

nightmares (not with azatadine, chlorpheniramine, cyproheptadine, desloratadine, hydroxyzine, or loratadine)

ringing or buzzing in ears

runny nose

skin rash

swollen joints

stomach discomfort, upset or pain

tender swollen glands in neck

tremor

unusual excitement, nervousness, restlessness, or irritability

vomiting

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?

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.
Connie Zheng, PharmD, is a drug information pharmacist at GoodRx and a licensed pharmacist in California. She has over 6 years of experience working in independent pharmacies.

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