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A female asked:
i took theraflu severe cold at 3pm and its now 7pm. can i take regular sudafed now?
2 doctor answers • 3 doctors weighed in

Dr. Andrey Lev-weissberg answered
Internal Medicine 18 years experience
Should be ok: Theraflu usually contains phenylephrine which has a short half life. Could use saudafed which has a long half life. A word of caution though as decongestants can increase your heart rate and blood pressure so consult your doctor if u think u may have a heart condition or glaucoma
3224 viewsReviewed >2 years ago

Dr. Steven Saunders answered
Internal Medicine 43 years experience
Theraflu: Always read directions. Both should not be taken at the same time, however it is likely ok to take Sudafed if you have passed the time for the next scheduled dose of Theraflu. Choose one or the other to treat your symptoms.
3224 viewsAnswered >2 years ago
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A 29-year-old member asked:
Can I take the pseudoephedrine that is behind the pharmacy counter, or is that too strong of a dose?
3 doctor answers • 3 doctors weighed in

A Verified Doctor answered
A US doctor answered Learn more
No: I would stick to the over-the-counter pseudoephedrine.
6654 viewsAnswered >2 years ago
CA
A 44-year-old member asked:
Are there any good effects of pseudoephedrine?
2 doctor answers • 2 doctors weighed in

Dr. Stephen Kimura answered
Allergy and Immunology 35 years experience
Yes: You are correct Pseudoephedrine has lots of side effects, such as shakiness, anorexia, palpitations and increased blood pressure. It is a very good decongestant though, and has been available for years in many prescription products such as Claritin (loratadine) d, zyrtec d, allergra d etc.
6376 viewsAnswered Apr 12, 2020
A 36-year-old member asked:
What are the side effects of pseudoephedrine?
1 doctor answer • 1 doctor weighed in

Dr. Jennifer Judkins answered
ENT and Head and Neck Surgery 29 years experience
Vasocontrictor: Pseudophedrine is a vasoconstrictor. This means it has the ability to temporarily narrow blood vessels. Taken orally this can cause dizziness, rapid heart rate (palpitations) or headache.
5750 viewsAnswered >2 years ago
A 42-year-old member asked:
Side effects of sudafed?
1 doctor answer • 2 doctors weighed in

Dr. Bryan Levey answered
Pediatrics 27 years experience
Many: Possible side effects include fast or irregular heart beats, tremor, restlessness, insomnia, nausea, vomiting, feeling nervous, high blood pressure, and more.
5826 viewsReviewed >2 years ago
A 38-year-old member asked:
What would happen if you took sudafed when you were not sick?
1 doctor answer • 2 doctors weighed in

A Verified Doctor answered
A US doctor answered Learn more
Dry mouth: Nothing bad is going to happen, but your mouth is likely to get dry and you may get a rapid heart rate for a while.
5698 viewsReviewed >2 years ago
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:
Last updated May 13, 2015
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