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Side Effects - Drug Side Effects

Side Effects of Childhood Medications

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Updated November 12, 2013

Parents and pediatricians are becoming much more aware these days of the possible side effects of the medications that kids are being prescribed.

Some high-profile reports about possible drug side effects has likely helped to get everyone's attention in recent years, including:

  • Singulair (montelukast) and a possible association with behavior/mood changes, suicidality (suicidal thinking and behavior) and suicide
  • over-the-counter cough and cold medicines and the FDA alert that the risks of taking them may outweigh the benefits for children under age 2
  • Tamiflu (oseltamivir) and a variety of neurologic and behavioral symptoms, including hallucinations, delirium and abnormal behavior
  • antidepressants and the increased risk of suicidal thoughts and behavior ("suicidality") in children and adolescents being treated with antidepressant medications
  • Accutane (isotretinoin) and the possible risk of birth defects and psychiatric effects (e.g., suicide ideation and suicide).

Although it is good to be aware of all possible risks when your child is being prescribed a medication, it can also sometimes work to limit a child's access to a medication that would have really helped him and in which the benefits would have outweighed the possible risks.

This is especially common when a parent doesn't want to treat their children with preventative steroid medications when they have asthma, because they are worried about the possible side effects of inhaled steroids.

Side Effects

All medications can have side effects.

To highlight that point, some people say that if you read about all of the possible side effects of commonly used over-the-counter medicines, such as Tylenol or Motrin, then you would likely never take them.

Among the most common side effects of medications are:

  • headache
  • nausea
  • insomnia
  • dizziness
  • anxiety
  • diarrhea
  • skin rashes
  • abdominal pain
  • fatigue
  • sleepiness
  • weight gain
  • allergic reactions

The important thing to remember is that these side effects usually only occur in a small percentage of children, so there is a good chance your child won't have any side effects when taking any specific medicine. Also, almost all drug side effects are temporary and go away once you stop the medicine or switch to a different medicine.

Drug Side Effects

In addition to the general drug side effects listed above, which can occur with almost any medicine, there are some side effects that are more commonly seen with specific medications.

Some of the more classic drug side effects that you may encounter or should be on the watch for include:

  • Amoxil side effects - as with other antibiotics, the most common Amoxil (Amoxicillin) side effects can include diarrhea, nausea and vomiting. In addition, Amoxil sometimes causes behavioral changes, including hyperactivity and agitation.
  • Prednisone side effects - even in the small short-term dosages that are used to treat asthma and poison ivy, the most common prednisone side effects can include mood changes, nervousness and insomnia.
  • Benadryl side effects - as with many other antihistamines, Benadryl (diphenhydramine) side effects usually include drowsiness and a dry mouth, which is often why many pediatricians recommend that children with regular allergies take a less sedating or nonsedating allergy medication, such as Allegra (fexofenadine), Claritin (loratadine), Clarinex (desloratadine) or Zyrtec (cetirizine) instead.
  • Concerta side effects - as with other forms of Ritalin (methylphenidate), the most common Concerta side effects can include a loss of appetite, nausea, stomach pain, insomnia, nervousness, headache and dizziness.
  • Flonase side effects - as with other steroid nasal allergy nose sprays, the most common Flonase (fluticasone) side effects can include cough, nasal irritation and nosebleeds.
  • Vyvanse side effects - as with other forms of dextroamphetamine, such as Adderall and Adderall XR that are used to treat ADHD, common Vyvanse (lisdexamfetamine) side effects include decreased appetite, headache, trouble sleeping, weight loss, abdominal pain, irritability and vomiting.
  • Reglan side effects - the most common Reglan (metoclopramide) side effects, which is sometimes used to treat children with reflux, include diarrhea, headache, nausea, insomnia, restlessness and decreased energy. It is the less common, but more serious, acute dystonic reactions and tardive dyskinesia, with involuntary movements, that sometimes limit the use of this medicine in pediatrics.
  • Omnicef side effects - as with other antibiotics, the most common Omnicef (cefdinir) side effects can include diarrhea, nausea and vomiting. In addition, Omnicef can sometimes causes a child's stool to have a reddish color, because of the interaction with iron vitamins, baby formula with iron or other iron-containing products.
  • Pyridium side effects - although not often used in pediatrics, the most common Pyridium (phenazopyridine) side effects is that it can cause staining of contact lenses and urine to turn a reddish orange color. Pyridium is sometimes used for the symptomatic treatment of urinary tract infections.
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