December 29, 2021
There is strong evidence of the effectiveness of a variety of ADHD medicines in reducing ADHD symptoms. While some are more effective than others, another factor in deciding on a course of treatment is minimizing noxious side effects.
One of those side effects is a headache.
An international team of researchers from Sweden, Germany, the Netherlands, the United Kingdom, the United States, and Australia conducted a systematic review of the peer-reviewed medical literature about ADHD and headaches on the one hand, and ADHD medications and headaches on the other.
As a baseline, they performed a meta-analysis of twelve studies with a combined total of over 2.7 million participants that compared headache rates between youths with and without ADHD. Those with ADHD were twice as likely to suffer from headaches. This held even after limiting the meta-analysis to the four studies that adjusted for confounders.
Breaking down the results by type of headache revealed a fascinating distinction. There was no significant difference in rates of tension headaches, but migraines were 2.2 times as frequent among youths with ADHD.
This strong association between ADHD and migraines suggests looking for medications that are both effective and unlikely to further contribute to the odds of migraine.
Accordingly, the team examined associations between specific ADHD medications and headaches.
Stimulant medications are generally considered the most effective medications for treating ADHD. A meta-analysis of ten studies with 2,672 participants found no association between amphetamines and headaches. On the other hand, a meta-analysis of 17 studies with 3,371 participants found that methylphenidate increased the odds of headache by one-third (33%).
The non-stimulant atomoxetine is usually considered a second-tier treatment for those among whom stimulants are contraindicated. A meta-analysis of 22 studies encompassing 3,857 participants found it increased the odds of headache by 29%.
Guanfacine fared worst of the bunch. A meta-analysis of eight studies combining 1,956 participants found it increased the odds of headache by 43%.
Finally, a meta-analysis of six studies with a combined total of 818 participants found no association with headaches.
There was no indication of publication bias in any of the meta-analyses.
Pei-Yin Pan, Ulf Jonsson, Sabriye Selin ŞahpazoğluÇakmak, Alexander Häge, Sarah Hohmann, Hjalmar Nobel Norrman, Jan K. Buitelaar, Tobias Banaschewski, Samuele Cortese, David Coghill, and Sven Bölte, “Headachein ADHD as comorbidity and a side effect of medications: a systematic review and meta-analysis,” Psychological Medicine(2021), published online,https://doi.org/10.1017/S0033291721004141.
Organic farming aims to protect biodiversity, promote animal welfare, and avoid using pesticides and fertilizers made from petrochemicals. Some pesticides are designed to target insects’ nervous systems but can also affect brain development and health in larger animals, including humans.
Many people believe organic food is healthier than conventionally produced food, which might be true for certain foods and health factors. But does eating organic food during pregnancy impact the chances of a child developing ADHD or autism spectrum disorder (ASD)?
In Norway, researchers can use detailed national health records to study these connections on a population-wide level, thanks to the country’s single-payer healthcare system and national registries.
The Norwegian Mother, Father, and Child Cohort Study (MoBa) invites parents to participate voluntarily and has a 41% participation rate. The study includes:
For this research, a team tracked 40,707 mother-child pairs from children born between 2002 and 2009. They used questionnaires to measure how much organic food mothers consumed during pregnancy. ADHD and ASD symptoms in children were assessed using validated rating scales.
The final analysis included:
The researchers adjusted for factors like maternal age, education, previous pregnancies, BMI before pregnancy, smoking and alcohol use during pregnancy, birth year and season, and the child’s sex.
The researchers concluded that eating organic food during pregnancy has no meaningful effect on the likelihood of a child developing ADHD or ASD. They stated, “The results do not indicate any clinically significant protective or harmful effects of eating organic food during pregnancy on symptoms of ADHD and ASD in the offspring. Based on these findings, we do not recommend any specific advice regarding intake of organic food during pregnancy.”
Infertility affects about one in six couples worldwide. To address this, medical experts have developed Assisted Reproductive Technologies (ART), including In Vitro Fertilization (IVF) with or without Intra-Cytoplasmic Sperm Injection (ICSI).
Some research suggests that children conceived through ART might have higher rates of intellectual disabilities, cerebral palsy, cancer, and neurological issues compared to children conceived naturally. However, studies looking at a possible link between ART and ADHD have produced mixed and conflicting results.
Until now, there hasn’t been a meta-analysis examining the connection between ART and ADHD. A South Korean research team has conducted the first systematic review and meta-analysis on this topic. Their final analysis included eight studies with a total of over ten million participants, comprising six cohort studies and two cross-sectional studies.
The research focused on two types of studies:
Both types of studies are observational, meaning they don’t involve controlled experiments and can be influenced by confounding factors. So they can document interesting associations, not causality. The studie were mostly large-scale national studies and used clinical ADHD diagnoses.
The researchers concluded that while there may be a small association between ART and ADHD, the effect is minimal, and the results are influenced by differences in study designs. They advised interpreting these findings with caution, noting, “The limited effect size and inherent heterogeneity underscore the need for cautious interpretation.”
Periodontitis, commonly known as gum disease, is a condition where the gums become inflamed. If untreated, it can cause the gums to pull back from the teeth, exposing their base, which may eventually lead to loose teeth or tooth loss. While this condition mostly affects adults, it’s also common among teens who don’t floss or brush their teeth properly.
Until now, only a few small studies have looked at a possible link between ADHD and gum disease. A team in Taiwan recently conducted a nationwide study to explore this connection.
Taiwan has a universal health insurance program, introduced in 1995, that provides medical care to nearly all (99.7%) residents. The Taiwan National Health Research Database collects and oversees all insurance claims, making it an excellent resource for large-scale studies.
The researchers used the database to identify teens aged 12 to 19 with ADHD (diagnosed by a psychiatrist) who had no history of gum disease between 2001 and 2011. These teens made up the ADHD group. They matched each ADHD participant with four teens who didn’t have ADHD or gum disease, creating a control group. The groups were matched by age, gender, enrollment date, family income, place of residence, and other health conditions (like obesity, diabetes, smoking, depression, and substance use).
All diagnoses of gum disease were confirmed by board-certified dentists.
The study included:
The researchers concluded that teens with ADHD have a higher risk of developing gum disease later on, even after accounting for other risk factors like smoking, diabetes, and depression. They stated, “ADHD is an independent risk factor for developing periodontitis.”
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