Prescription Prices and Coupons from GoodRx
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Dantrolene Coupon - Dantrolene 25mg capsule
DANTROLENE helps to relieve spasms and stiffness of muscles in conditions such as multiple sclerosis, cerebral palsy, stroke, or injury to the spine. This medicine can also help prevent and treat a condition called malignant hyperthermia, which may occur after surgery or anesthesia. The lowest GoodRx price for the most common version of dantrolene is around $34.44, 64% off the average retail price of $96.13. Compare muscle relaxants.
Prescription Settings
90 capsules
Dantrolene Coupon - Dantrolene 25mg capsule
90 capsules

Dantrium Side Effects

What should I watch for?

Your condition will be monitored carefully while you are receiving this medicine.

You may get drowsy or dizzy. Do not drive, use machinery, or do anything that needs mental alertness until you know how this medicine affects you. Do not stand or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells. Alcohol may interfere with the effect of this medicine. Avoid alcoholic drinks.

If you are taking another medicine that also causes drowsiness, you may have more side effects. Give your health care provider a list of all medicines you use. Your doctor will tell you how much medicine to take. Do not take more medicine than directed. Call emergency for help if you have problems breathing or unusual sleepiness.

This medicine can make you more sensitive to the sun. Keep out of the sun. If you cannot avoid being in the sun, wear protective clothing and use sunscreen. Do not use sun lamps or tanning beds/booths.


Common and Rare Side Effects

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. Serious side effects are very rare when dantrolene is taken for a short time, for example, when it is used for a few days before, during, or after surgery or anesthesia to prevent or treat malignant hyperthermia. However, serious side effects may occur, especially when the medicine is taken for a long time.

Check with your doctor immediately if any of the following side effects occur:

Less common

Bloody or black, tarry stools

bloody or dark urine

bluish color changes in skin color

changes in speech

chest pain



convulsions (seizures)

decrease in frequency of urination

decrease in urine volume

difficult urination

difficulty in moving

difficulty in passing urine (dribbling)

difficulty in swallowing

fast, pounding, or irregular heartbeat or pulse

increased frequency of urination

increased urge to urinate during the night

joint pain

light-colored stools


loss of bladder control

mental depression

muscle aching or cramping

muscle pains or stiffness

muscle spasm or jerking of all extremities

nausea and vomiting

pain in lower back

pain or burning while urinating

pain, tenderness, or changes in skin color

painful urination

severe stomach pain

shortness of breath

skin rash, hives, or itching

slow or troubled breathing

sudden decrease in amount of urine

sudden loss of consciousness

swelling of foot or leg

swollen joints

unusual tiredness or weakness

upper right abdominal pain

vomiting of blood or material that looks like coffee grounds

waking to urinate at night

yellow eyes or skin

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




general feeling of discomfort or illness

muscle weakness

Less common

Abdominal or stomach cramps or discomfort

abnormal hair growth

acne-like rash

blurred or double vision or any change in vision

change in taste

chills and fever

disturbed color perception

excessive tearing

halos around lights


itching skin

loss of appetite

night blindness

overbright appearance of lights

redness of skin

seeing double

skin rash, encrusted, scaly and oozing


slurring of speech or other speech problems

sudden decrease in amount of urine


trouble in sleeping

tunnel vision

unable to sleep

unusual nervousness

weight loss

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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