Compare cromolyn vs. mercaptopurine

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Relieves nasal allergy symptoms. Intal (Cromolyn) is a good option to relieve nasal allergy symptoms when antihistamines aren't working. Good choice for pregnant women.Coming soon.
How it works
Intal (Cromolyn) is a mast-cell stabilizer nasal spray that prevents and treats seasonal allergies.Coming soon.
Type of medication
Mast cell stabilizerPrescription or OTC
Coming soon.
Available as
  • Nasal spray
  • Pill
  • Liquid
Used for (click to learn more)
  • Acute lymphoid leukemia
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Reviews & ratings
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Side effects

We haven’t found good data for cromolyn side effects.

FDA side effect reports for cromolyn »

We haven’t found good data for mercaptopurine side effects.

FDA side effect reports for mercaptopurine »
Risk factors for serious side effects
Coming soon.Coming soon.
Pregnancy category
BFDA pregnancy category (Probably safe)

Research studies with animals haven’t found a risk to unborn babies, but it hasn’t been properly studied in humans.

See the FDA package insert
DFDA pregnancy category (Weigh risks vs. benefits)

Research studies with real people found harmful effects on unborn babies, but the benefits might outweigh the risks even if you’re pregnant. Talk with your doctor.

See the FDA package insert
No specific alcohol-related info.No specific alcohol-related info.
No specific food-related info.No specific food-related info.
Kidneys and liver
No specific kidneys and liver-related info.No specific kidneys and liver-related info.
No specific sex-related info.No specific sex-related info.
No specific sleep-related info.No specific sleep-related info.
No specific weight-related info.No specific weight-related info.
Upsides and benefits
  • Treats nasal allergy symptoms.
  • Most people don't have many side effects since it works in the nose and doesn't affect the rest of your body.
  • It's a good option for pregnant women. Can also be used for kids 2 years and older.
  • Doesn't make you drowsy or dizzy.
  • No prescription is needed.
Coming soon.
Downsides and risks
  • Needs to be used regularly for at least a week to see any good effects.
  • Can have an unpleasant smell or taste.
  • Can cause headaches, or burning and stinging in your nose.
Coming soon.
Tips from our pharmacists for people taking the medication
  • Works best when used one week before exposure to allergens. It takes about 1 to 2 weeks until you feel the full effects.
  • Check with your doctor or pharmacist to make sure you know how to use this nose spray. Don't use more than recommended.
  • Shake the spray gently and clear your nose before each use.
  • Before using it for the first time, prime the spray pump until you see a fine mist.
  • Breathe in slowly as you're spraying. Wait a few minutes before blowing your nose if needed.
Coming soon.
Learn more
More about cromolynSide effectsAlternativesFDA package insert
More about mercaptopurineSide effectsFDA package insert