Erectile dysfunction drugs such as sildenafil (Viagra) are contraindicated in clients taking nitrates for angina. What is the primary concern with concurrent administration of these drugs?
1) They contain nitrates, resulting in an overdose.
2) They decrease blood pressure and may result in prolonged and severe hypotension when combined with nitrates.
3) They will adequately treat the patient's angina as well as erectile dysfunction.
4) They will increase the possibility of nitrate tolerance developing and should be avoided unless other drugs can be used.