Precautions and warnings to be aware of prior to taking Methylin include the following:
Methylin Chewable Tablets must be taken with a full glass of water (at least eight ounces) after chewing the tablets in order to prevent choking.
Methylin Chewable Tablets (but not the oral solution) contain phenylalanine. This is important for people with phenylketonuria, who must limit their intake of this substance.
Stimulants (including Methylin) are often abused. Taking these drugs for a long time can lead to drug dependence (see Methylin Abuse). Because Methylin is commonly abused, there are special rules for prescribing it (see Methylin: A Controlled Substance).
In people with psychotic disorders (such as schizophrenia or schizoaffective disorder), Methylin can make certain psychotic symptoms worse, such as thought disorders and behavior problems.
Sudden death has been reported in children and adults with heart problems who were taking normal doses of Methylin. If you or your child has heart problems, ask your healthcare provider if Methylin is appropriate in your situation. Also, let your healthcare provider know if you or your child develops any chest tightness, chest pain, shortness of breath, or fainting.
Methylin can cause an increase in blood pressure and heart rate. In most cases, the increase is small and does not cause problems. However, there is an increased risk for people who already have high blood pressure, congestive heart failure, certain irregular heart rhythms (arrhythmias), or have recently had a heart attack.
The medication can cause a temporary slowing down of growth and decreased weight gain in children. This is usually small, and children typically catch up to normal growth rates with time. Your child's growth should be monitored while he or she is taking Methylin.
Methylin may affect your ability to perform tasks that require complete concentration, such as driving, operating machinery, or piloting an airplane, especially during the first few weeks of treatment. It is recommended that you discuss this with your healthcare provider.
The medication should not be used to treat severe depression, nor should it be used to prevent or treat fatigue.
Methylin is considered a pregnancy Category C medication. This means that it may not be safe to use during pregnancy. Discuss this with your healthcare provider before using the medication while pregnant (see Methylin and Pregnancy for more information).
It is not known if Methylin passes through breast milk. Therefore, if you are breastfeeding or plan to start, discuss this with your healthcare provider.
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