Erm I take a round one, then a pink one and I chop that big one in half because I cant swallow it!
This has been my actual experience of witnessing a close family member taking a complex regime of medication, when I asked her what she thought they were for she didnt really know, just that some made her sick, some gave her dry skin and others were hard to swallow, so she decided by herself not to take too much of those ones!
This is I bet is quite typical of a number of patients who have long term conditions, they are not just on one medicine for one condition, they are typically on more than one medication for multiple long term conditions. So consider the whole patient, understand the co-morbidities and the multiple medicines regimes they may be on, this may help unlock some key insights when developing a patient adherence solution, Anonymized Patient Level Data (APLD) can help you start to do this.