These drugs inhibit the action of angiotensin-converting enzyme, producing a balanced vasodilation, along with other favourable effects.
en.wikipedia.org Iontophoresis, for example, allows local administration of the drug, preventing the systemic effects listed above but still inducing local microvascular vasodilation.
en.wikipedia.org For these drugs in particular, vasodilation can be associated with some adverse effects which might include orthostatic hypotension, tachycardia, headaches and palpitations.
en.wikipedia.org Symptoms consist of redness (mainly due to vasodilation of the peripheral small blood vessels), oedema (swelling) of the conjunctiva, itching, and increased lacrimation (production of tears).
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