One of the many potential side effects of Rubinol is impotence.
Here is a list of other side effects.
Adverse reactions to anticholinergics such as Rubinol may include dry mouth: urinary hesitancy and retention; blurred vision due to mydriasis; increased ocular tension; tachycardia; palpitation; decreased sweating; loss of taste; headache; nervousness; drowsiness; weakness; dizziness; insomnia; nausea; vomiting; impotence; suppression of lactation; constipation; bloated feeling; severe allergic reaction or drug idiosyncrasies including anaphylaxis; urticaria and other dermal manifestations; some degree of mental confusion and/or excitement, especially in elderly persons.