Low-dose melatonin (0.5mg–1mg) or magnesium glycinate (200–300mg) are the safest choices. For a 70-year-old specifically, we prioritise safety criteria from the Beers Criteria and AGS guidelines. Neither melatonin nor magnesium glycinate are listed as potentially inappropriate — they have minimal drug interaction risks, no grogginess at recommended doses, and no tolerance or dependence. Start with melatonin 1mg if the problem is falling asleep, or magnesium glycinate 200mg if the problem is staying asleep or anxiety at bedtime.

Avoid all antihistamine-based sleep aids (diphenhydramine, doxylamine) in patients over 65 — these are explicitly listed as inappropriate in the Beers Criteria due to fall risk, cognitive impairment, and urinary retention.

Yes — melatonin is generally safe for seniors with anxiety. It does not interact with most anxiolytic medications (buspirone, SSRIs) and does not worsen anxiety. However, melatonin alone may not be sufficient if anxiety is the primary driver of insomnia. In that case, magnesium glycinate or L-theanine — both of which have direct anti-anxiety mechanisms — may be more effective either alone or combined with low-dose melatonin.

Exception: seniors on benzodiazepines (diazepam, lorazepam, alprazolam) for anxiety should consult their pharmacist before adding any sleep supplement, as combinations may amplify sedation.

0.5mg to 3mg — significantly lower than standard pharmacy doses. Most OTC melatonin products come in 5mg, 10mg, or even higher doses — these are far too high for elderly adults. Research shows 0.3mg is as effective as 3mg for sleep onset in older adults, and that higher doses increase next-day grogginess and can disrupt circadian rhythms with long-term use.

Natrol's 1mg fast-dissolve tablets (available on iHerb) are ideal — they allow seniors to take one tablet or break it in half for a 0.5mg starting dose, with a pleasant taste that dissolves without water.

Yes for most seniors — magnesium glycinate is generally safe for nightly use. Magnesium is an essential mineral, and many older adults are deficient. Taking 200–300mg of magnesium glycinate nightly is not habit-forming and provides ongoing benefits for sleep, muscle function, blood pressure regulation, and bone health.

Important exception: seniors with significant kidney disease (CKD Stage 3–5) should not supplement magnesium without medical supervision, as impaired kidneys cannot excrete excess magnesium and toxicity can occur.

There is concerning evidence suggesting a link. A landmark 2015 JAMA Internal Medicine study (n=3,434) found that cumulative use of anticholinergic medications — including diphenhydramine — was associated with a significantly increased risk of dementia (OR 1.54 for highest use category). A 2019 study in the BMJ reinforced these findings with a larger UK dataset.

The mechanism is biological: diphenhydramine crosses the blood-brain barrier and blocks acetylcholine, a neurotransmitter essential for memory and cognitive function. This is the same mechanism that causes short-term confusion in elderly users — and long-term, repeated blocking of this system may cause lasting damage. While causality has not been definitively proven, the precautionary principle is clear: safer alternatives exist, so there is no reason to accept this risk.

L-theanine has an excellent safety profile with cardiac medications. Unlike valerian root or antihistamines, L-theanine has no known significant interactions with antihypertensives (amlodipine, lisinopril, losartan), beta-blockers, statins, or most other cardiac medications. Its mechanism is entirely different — it promotes alpha-wave brain activity and GABA without systemic sedation.

One theoretical consideration: some studies suggest L-theanine may have a mild blood-pressure lowering effect. If you are already on antihypertensive medications, this is generally not a problem — but if your BP is already on the lower end, discuss with your pharmacist. The clinical significance at standard 200–400mg doses is minimal.

Yes — iHerb ships to most African countries including Nigeria, Ghana, Kenya, and South Africa. iHerb ships internationally from their GMP-certified warehouses and typically takes 7–21 business days to most African countries. Customs duties may apply depending on the quantity and value of your order.

Alternatively, Enavec Pharmacy can source authentic supplements for customers in Nigeria with pharmacist consultation, prescription screening, and nationwide delivery. Contact us on WhatsApp to check current stock and pricing.