Warning against the potency-enhancing product Rock Hard Weekend

22 December 2009

The Danish Medicines Agency strongly warns against using the potency-enhancing product Rock Hard Weekend after the FDA (U.S. Food and Drug Administration) has notified the Danish Medicines Agency that Rock Hard Weekend contains an undeclared active substance and that the product has been exported from the USA to Denmark.

FDA's analysis of Rock Hard Weekend has shown that the product contains the active substance sulfoaidenafil, which has not been declared on the package. On the contrary, the package declares that the product contains a blend of herbs.

The active substance sulfoaidenafil is an analogue of sildenafil, which means that it has the same effect and side effects as the active substance sildenafil, an approved drug used as treatment for erectile dysfunction. You should only begin treatment with medicine containing this substance if you have consulted a doctor. The Danish Medicines Agency has not approved the product Rock Hard Weekend.

If you have taken Rock Hard Weekend, the Danish Medicines Agency advises you to:

  • stop taking the product
  • contact your general practitioner, if concerned.

You can hand over any unused medicine to a pharmacy, which will dispose safely of this illegally sold product.
We also urge persons who buy medicine on the internet to be careful and to seek advice from their doctor before buying prescription-only medicinal products. The doctor may then assess the effect and side effects of the product, including whether or not the product concerned would benefit the patient.

For further information, please contact Special Adviser Gitte Albæk Nielsen, tel. +45 4488 9323 or pharmacist Lisbeth Hemmingsen, tel. +45 4488 9746.

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