Can 5mg lisinopril cause weight gain?

No: Unless one has renal artery stenosis that is aggravated by Lisinopril (or other ace inhibitor) leading to fluid retention eg edema, I have not read or heard about Lisinopril causing weight gain. Check out http://www.Drugs.Com/sfx/lisinopril-side-effects.Html for some side effects associated w/lisinopril.

Maybe 6 months: While clinical studies show link between Lisinopril and weight gain, it is unclear if this is actually because of medication or due to something else.If the weight gain is rapid, this may be a sign of congestive heart failure and should be reported to your healthcare provider. If you are taking Lisinopril and weight gain occurs gradually, try increasing your exercise or eating heart friendly diet.

Yes.Report to doctor: Should this occur, report it to your doctor immediately. http://www.ncbi.nlm.nih.gov/pubmedhealth/pmh0046064/#ddic602023.side_effects_section.