[Sdiver]

Two quick questions ...

1) how long has he been taking his Lisinopril, and most importantly the Atovaquone/Proguanil ?

2) What is his race/ethnicity ?


ETA some differential Dx's .....

Dad's back pain came from jump into Holland so we can r/o that being a genetic trait.

Mom's RA is a possible genetic trait. Which in combination with the Lisinopril could exacerbate the back pain which is a possible side effect of Lisinopril.

The back pain can also be a hypersensitivity to the Malarone (would really like to know his race/ethnicity .... I reference the M*A*S*H episode with Klinger and Goldman taking the Primaquine.) Also Black's having an acute hypersensitivity to Malaria drugs.

Also, the combination of the Mararone and the supplements he's taking may be causing an adverse reaction. The effects of some drugs can change if you take other drugs or herbal products at the same time. This can increase your risk for serious side effects or may cause your medications not to work correctly.

Also possible, a combination of all three above.