Therefore, the use of such combinations is not recommended. The dose may need to be adjusted in patients taking other medicines that block enzymes that break down Levitra. It explains how the Committee for Medicinal Products for Human Use CHMP assessed the medicine to reach its opinion in favour of granting a marketing authorisation and its recommendations on the conditions of use for Levitra. Erythromycin mg t. If you are concerned by any side effects, you should discuss them with your doctor. Physicians should inform their patients that in some patients concomitant use of PDE5 inhibitors, including LEVITRA, with alpha-blockers can lower blood pressure significantly leading to symptomatic hypotension e. Patients should be counseled that concomitant use of LEVITRA with nitrates could cause blood pressure to suddenly drop to an unsafe level, resulting in dizziness, syncope, or even heart attack or stroke.A mg dose of vardenafil is approximately equivalent to 50 mg of sildenafil, or Viagra. This is because the chemical composition of vardenafil is different from that of sildenafil. Vardenafil is. from $1, for 30 tablets 10 mg Levitra oral tablet from $ for 2 tablets 20 mg Levitra oral tablet from $ for 2 tablets Levitra Coupons, Copay Cards and Rebates . Typical dose: The typical starting dose of Cialis for occasional use is one 10 mg tablet. It can be dropped to 5 mg or increased to 20 mg depending on how you respond. The daily dose for regular use is mg to 5 mg. .